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GardenChatter The Official Publication of Laclede County Master Gardeners October - 2016 Laclede County Master Gardeners 186 N. Adams Ave. Lebanon Ph. 532-7126 President Glennie Kinnett 417- 588-0198 [email protected] Secretary Barbara Thompson 417-533-8148 Treasurer Brent Smith Newsletter Editor Robert “Bob” Smith III, 417-532-5783 [email protected] Master Gardeners of Laclede County 186-D N. Adams Ave. Lebanon, Missouri 65536 Phone: 417-532-7126 • Fax: 417-532-4587 University of Missouri Extension does not discriminate on the basis of race, color, national origin, sex, religion, age, disability or status as a Vietnam-era veteran in employment or programs. There is limited seating for this program So be sure and call in our reservations NOW Call The Extension Office at 532-7126

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Page 1: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

GardenChatter

The Official Publication of Laclede County Master Gardeners

October - 2016

Laclede County Master

Gardeners 186 N. Adams Ave. Lebanon

Ph. 532-7126

President

Glennie Kinnett 417- 588-0198

[email protected]

Secretary

Barbara Thompson 417-533-8148

Treasurer

Brent Smith

Newsletter Editor

Robert “Bob” Smith III, 417-532-5783

[email protected]

Master Gardeners of Laclede County

186-D N. Adams Ave.

Lebanon, Missouri 65536

Phone: 417-532-7126 •

Fax: 417-532-4587

University of Missouri Extension does not

discriminate on the basis of race, color,

national origin, sex, religion, age, disability or

status as a Vietnam-era veteran in

employment or programs.

There is limited seating for this program

So be sure and call in our reservations

NOW

Call The Extension Office at 532-7126

Page 2: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

Wet Weather Can Cause Seeds to Sprout on the Plant

William J. Wiebold

[email protected]

Corn and soybean seeds possess several mechanisms that prevent sprouting before maturity. The

primary mechanism is a balance between two growth hormones, gibberellic acid (GA) and abscisic

acid (ABA). In general, GA promotes germination and ABA inhibits ge rmination. The

concentrations of ABA in corn and soybean seeds peak during the middle of seed filling and begin

to decrease as the seeds near maturity. Before maturity, seeds are prevented from germinating even

though water content and other factors would stimulate germination. After maturing, seeds of most

of our grain crops are capable of germinating if conditions are favorable. Unfortunately, this also

means that, seeds from normal corn and soybean plants can germinate on the ear or in the pod if

certain weather events occur.

The two primary requirements for seed germination are temperature and moisture. The minimum

temperature for corn and soybean seed germination is about 50°F or a little cooler. Germination can

occur within a couple of days with temperatures in the 80s. This year has provided abundant

number of days with temperatures conducive to rapid germination. So, the primary factor that

should reduce seed germination on the plant is moisture. Critical grain moistures that stimulate

germination are 30 to 50%, depending on crop. In normal years, grain dries as it matures to

moisture percentages far below requirements for germination. Unfortunately, weather in late

summer and early fall has included heavy rain events and heavy, long-lasting dews.

Normally, corn husks protect mature kernels from moisture that may cause germination. If the ear

turns downward at maturity, the husks shed water and the chances of kernels sprouting on the ear

are almost eliminated. But, if the ear remains upward, water from rain or even a heavy dew may run

down the inside of the husks and pool at the butt end of the ear. Husks trap water near the kernels

and if temperatures are above 50°F kernels will likely germinate. Sprouting on the ear is almost

always limited to several rows of kernels at the butt end of the ear because this is where water is

trapped. But, this year occurrences of rainfalls greater than several inches may have allowed water

levels in upright ears to rise higher on the ear.

Page 3: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

For soybean, the pod wall helps prevent mature soybean seeds from absorbing water by shedding

rain water. Frequent rains, continuous drizzle, or foggy days and nights can bathe the soybean pod

in enough water that the water soaks through the pod wall and wets the soybean seed.

A more common reason for soybean seeds sprouting in the pod is that the pod wall has separated or

broken. This allows water access to the seeds. During wetting and drying cycles, mature soybean

seeds expand and contract. Expanding seeds exert heavy pressure on the soybean pod wall. Soybean

pods walls do not expand as much as soybean seeds. The two halves of the pod wall are sutured

together and these sutures can rupture if enough pressure is provided by expanding seeds. If the two

halves of the pod wall separate and the seed dries and shrinks, the seed may fall from the pod. This

is called shattering.

Under wet conditions, the soybean seed remains swollen and will not fall from the pod. But, the

now exposed seed will likely germinate if it remains wet long enough and if the temperature is

above the minimum.

Premature sprouting is quite damaging to grain quality and reduces safe storage time. During

germination, seeds release enzymes that break down carbohydrates, proteins and fats. This

breakdown releases free sugars, amino acids, and fatty acids. These simple compounds spoil easily

in storage and stimulate fungal growth. The soybean seed coat and the corn kernel pericarp rupture

during germination, and this makes the grain vulnerable to invasion by fungi and insects.

Germinated seeds will crack during combining. Debris from sprouted seeds will often accumulate

in the center of a bin and may be a fire hazard.

Unfortunately, sprouted seeds is a permanent damage to grain. Spread of the damage can b e

reduced by timely harvest and quick drying of grain to stop germination and grain deterioration. If

possible, grain should be screened to remove debris before storage. Be aware that dockage at the

point of sale may reduce grain price.

Page 4: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

Add Some Eye Candy to Your Garden This Fall By Melinda Myers

Shorten the winter season with the help of spring flowering bulbs that you plant in fall. These beauties often provide the

first bit of color, fragrance and winter relief each year.

Look for new and unique ways to incorporate bulbs into your landscape. Create a seasonal water feature with a river of

blue scillas and grape hyacinths meandering through the garden. Welcome visitors with a front door or walkway garden

that blooms from early spring through early summer and is loaded with crocus, tulips, daffodils and allium.

Don’t overlook those shady spots. Many of these locations provide enough early season sun, before the trees leaf out, for

bulbs to grow and flower. Use more shade tolerant spring bloomers like snowdrops, grape hyacinths, scillas, anemones,

daffodils, fritillarias and Camassias in shady areas among hostas, ferns and other shade tolerant perennials.

Whether you’re new or experienced, growing bulbs is an easy endeavor. Just follow these simple steps to a beautiful

spring garden.

Selection

Purchase bulbs that are dense and firm, and free of bruises or mold. Shop early for the best selection. Mail order sources

will ship your bulbs at the proper planting time. If you buy locally, store the bulbs in a dry, well-ventilated and cool 60-

degree location until it’s time to plant.

Don’t let deer, rabbits and chipmunks dissuade you from planting. Include hyacinths, grape hyacinths, scillas, glory-of-

the-snow, fritillarias, alliums and Camassias that the animals tend to overlook.

Design Ideas

Include a variety of bulbs for added color throughout spring. Early bloomers like Glory of the Snow, crocus, early tulips

and daffodils, and grape hyacinths (Muscari) are followed by mid-season daffodils and tulips along with fritillarias. Late

spring blooming tulips and alliums finish off the spring display.

Combine several bulbs that bloom at the same time to double the floral impact or at different times to extend the color

throughout the spring. You can create your own combinations or look for prepackaged combinations prepared by experts

like those at Longfield Gardens (www.Longfield-Gardens.com). Low growing White Splendor anemone along with

Ocean Magic grape hyacinth make a striking combination for under shrubs. The yellow blossoms of Dutch Master

daffodils, pink Involve tulips and purplish blue grape hyacinths will give you several layers of color in the garden.

Or add a bit of eye-catching red to the garden throughout the spring with the Really Red collection of tulips. Red Emperor

starts things out in early spring, followed by Oxford and ends with double-flowering Red Princess and Sky High Scarlet.

Location

Plant bulbs in well-drained soil for best results. Avoid areas such as next to the dryer vent or against the south side

foundation of your home that tend to warm up early in spring or experience a winter thaw. These bulbs often sprout too

early and subsequent cold temperatures can limit or eliminate their bloom.

Reduce maintenance and boost your garden’s beauty by mixing bulbs with perennials. Once the bulbs are done blooming,

the neighboring perennials mask the fading bulb foliage.

When and How to Plant

Increase growing success in poor soils by incorporating several inches of compost, peat moss or other organic matter into

the top 12” of soil. This improves drainage in clay soil and the water-holding ability of sandy and rocky soils. Then be

sure to incorporate a low nitrogen, slow release fertilizer.

Wait to plant your bulbs until the soil cools. This is any time after the night temperatures are consistently 40 to 50

degrees, but several weeks before the ground freezes.

Page 5: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

Plant spring blooming bulbs three times as deep as the bulb is tall. Water thoroughly to remove air pockets and encourage

fall root growth. Add a layer of mulch to conserve moisture, suppress weeds and reduce the risk of early sprouting.

So break out your trowel and garden gloves and get busy planting. You’ll be glad you did when spring arrives and your

yard and garden are filled with a rainbow of beautiful flowers.

Melinda Myers has over 30 years of gardening experience and has written over 20 gardening books, including Small

Space Gardening. She hosts The Great Courses “How to Grow Anything: Food Gardening For Everyone” DVD set and

the nationally syndicated Melinda’s Garden Moment TV & radio program. Myers is a columnist and contributing editor

for Birds & Blooms magazine and was commissioned by Longfield Gardens for her expertise to write this article.

Autumn Crocus: A Touch of Spring in Fall

David Trinklein

[email protected]

As the gardening season begins to wane, a plant with crocus -like flowers comes into bloom, seemingly out

of nowhere. The result is an unexpected appearance of spring in the fall of the year.

The plant in question is Colchicum autumnale , commonly known as autumn crocus or meadow saffron. Its

flowers arise from the soil without leaves and often achieve a height of between 8 to 10 inches. Although

the flower resembles that of a crocus in shape, autumn crocus is a member of the Liliaceae (Lily) family of

plants while crocus belongs to the iris ( Iridaceae) family.

Autumn crocus often is planted just before it blooms. In fact, it can even be planted while in full bloom.

The large bulb-like corms the plant produces contains sufficient nutrients and water to comple te the

flowering process without being in soil. At times in the past, gardeners would purchase the corms and allow

them to flower indoors and then plant them in the garden. This practice, however, did result in some drying

of the corm while indoors resulting in flowers that did not last very long after being planted outdoors.

Page 6: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

The leaves of autumn crocus are produced in the fall of the year, after flowering has occurred. However,

they do not make significant growth until the following spring. By late spring, the strap-like leaves which

are about 12 inches long and one inch wide, wither and die. No further above -ground evidence of the plant

exists until its flowers appear in September.

Autumn crocus tolerates a wide array of exposures from full sun to partial shade. It prefers a well-drained

garden loam; poor drainage or very tight soils can weaken plants and induce bulb rot. Plant the corms three

to four inches deep in soil that has been amended with a general purpose fertilizer such as 5 -10-5.

Rock gardens, raised beds or sites under trees are ideal locations for autumn crocus. It can tolerate light

shade from deciduous trees but avoid planting it under trees that cast dense shade. Much of the leaf growth

of autumn crocus occurs in early spring before trees ha ve leafed out fully.

There are several varieties of autumn crocus available. ‘Lilac Wonder’ and ‘The Giant’ are two of the most

spectacular because of their large flower size. Flower color is violet -mauve and rosy-lilac, respectively.

‘Waterlily’ is a double-flowered pink variety also available. Although not as large as the previously -

mentioned varieties, it is quite attractive.

There are no major pests of autumn crocus, but a word of caution must be given. The corms of autumn

crocus are highly poisonous because of a compound they produce called colchicine. The latter has seen

limited medicinal use to treat conditions such as gout, certain types of cancer, irritable bowel syndrome and

pericarditis. It also is used in plant breeding to induce polyploidy in p lant species such as daylily.

Because of its highly toxic nature, autumn crocus should not be planted in gardens frequented by

unattended children or pets.

In addition to autumn crocus, there are several species of true crocus that also flower in the fall, rather than

in the spring. Like autumn crocus, their corms need soil with excellent drainage. Failure to provide the

latter results in general decline and ultimate loss of the plant. Loose, somewhat sandy, soil ideally fits their

preference. Again, these crocuses are good candidates for rock gardens, raised beds or under trees that cast

light shade.

Most of the true crocuses that flower in autumn bear flowers that only rise about six inches above the soil.

Additionally, their foliage is much smaller and more grass-like when compared to Colchicum autumnale .

Crocus sativus, commonly known as saffron crocus, is probably the best -known of the true crocuses that

flower in the fall. In addition to being a highly attractive flower, it is the source saffron. The la tter is

widely known as the most expensive spice in the world. Saffron is derived from the deep -orange stigmas of

the flowers. There are only three stigmas (also called saffron threads) per flower. Given that it takes about

14,000 threads to produce one ounce of saffron, it is no wonder that saffron is priced and sold by the gram.

Another reliable true crocus that flowers in the fall is Crocus speciosus, also known as Bieberstein's crocus.

It bears attractive flowers that are light purple in color with violet veins. It increases rapidly in the

landscape and is a good choice for naturalization.

In both of the above cases, the crocus will flower soon after it is planted. Now is an

ideal time to look for their corms at retail outlets.

Someone once mused, people should plant autumn crocus at least once, if for no other reason than to

surprise your neighbor. An under-used fall bloomer, autumn crocus plants are a welcome addition to the

usual combination of chrysanthemums and asters used by gardeners to exte nd color in the garden late into

the growing season.

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Gardening by Month - October Monthly Tips and Tasks

Category

Week

Activity

1 2 3 4

Ornamental x x x x Continue watering, especially evergreens if soils are dry.

x x x x

Nuts or seeds of woody plants usually require exposure to 3 months cold before sprouting. This may be provided by outdoor planting in fall or "stratifying" in an unsealed bag of damp peat moss placed in the refrigerator.

x x x x Container grown and B & B trees and shrubs can be planted. Loosen the soil in an area 2 times the diameter of the root ball before planting. Mulch well after watering.

x x x x Plant spring bulbs among hostas, ferns, daylilies or ground covers. As these plants grow in the spring they will hide the dying bulb foliage.

x x For best bloom later this winter, Christmas cactus, potted azaleas and kalanchoe may be left outdoors until night temperatures drop to about 40 degrees Fahrenheit.

x x x Spring bulbs for forcing can be potted up now and stored in a cool, frost-free place until it is time to bring indoors, usually 12 to 15 weeks.

x x Cannas and dahlias can be dug when frost nips their foliage. Allow the plants to dry under cover in an airy, frost-free place before storage.

x x Transplant deciduous trees once they have dropped their leaves.

x Plant tulips now.

x Trees may be fertilized now. This is best done following soil test guidelines.

Lawn x x Seeding should be finished by October 15.

x x Broadleaf herbicides can be applied now to control cool-season weeds such as chickweed and dandelion.

x x Continue mowing lawns until growth stops.

x x Keep leaves raked off lawns to prevent smothering grass.

x x Now is a good time to apply lime if soil tests indicate the need.

x Winterize lawn mowers before storage.

Vegetables x x x x Sow cover crops such as winter rye after crops are harvested.

x x Harvest winter squash and pumpkins before frost. For best storage quality, leave an inch or two of stem on each fruit.

x x Dig sweet potatoes before a bad freeze.

x x x x Gourds should be harvested when their shells become hard or when their color changes from green to brown.

x x x x A few degrees of frost protection may be gained by covering tender plants with sheets or light-weight fabric row covers.

x x x x Continue harvesting tender crops before frost.

x x x x The average first frost usually arrives about October 15-20.

Fruits x x x x Store apples in a cool basement in old plastic sacks that have been

Page 8: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

Category

Week

Activity

perforated for good air circulation.

x x Persimmons start to ripen, especially after frost.

x x Monitor fruit plantings for mouse activity and take steps for their control if present.

x Place wire guards around trunks of young fruit trees for protection against mice and rabbits.

x Fall color season begins.

x Begin peak fall color in maples, hickories and oaks.

x End of peak fall color.

October Pests and Problems

Plant cool-season lawn grasses by October 15. Existing lawn or newly seeded areas that are at least one month old can also be fertilized at this time. Dig and divide or plant new perennials by October 15 to allow time for the plants to root in well before winter.

Apply herbicides to kill cool-season, broad-leaf weeds in lawns, such as dandelion, plantain, chickweed, henbit and dead nettle now when the weeds are actively growing. Applying herbicides in the fall can reduce damage to nearby plants. Spot-application to individual weeds is more environmentally friendly than wholesale application to the whole lawn.

Winter Annual Weeds

Henbit (Lamium amplexicaule)--also called, dead nettle, blind nettle, bee nettle--can be a

pest of the lawn or garden

Winter Annual Weeds

Red deadnettle (Lamium purpureum) can be a pest of the lawn or garden

Perennial Broadleaf Weeds

in Lawns Dandelions are native

plants but most homeowners would

consider them weeds

Protect newly planted spring-flowering bulbs from squirrels and dogs that can dig them up by covering the areas with chicken wire. Hold off planting tulips until November when the soil temperature is cooler.

Page 9: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

Turn Yard Waste into Gardener’s Gold - Compost By Melinda Myers

Save time and money by turning landscape trimmings into a valuable soil amendment.

The idea is simple, just collect disease- and insect-free plant debris into a heap and let it decompose into a fine,

nutrient rich material that helps improve the soil. Don’t add meat, dairy, invasive plants, weeds that have gone

to seed or perennial weeds that can take root and grow in your compost pile.

Speed things up by layering yard waste with soil or compost, adding a bit of fertilizer to each layer and

moistening to a consistency of a damp sponge. Further speed up the process by making the pile at least three-

feet tall and wide.

Turn the pile as time allows, moving the more decomposed materials from the center to the outside of the pile.

It’s a great work out and speeds up the decomposition. The more effort you put into composting the sooner you

have rich organic matter for your garden.

Build the pile in a location that is convenient for adding raw materials and harvesting the finished compost.

Consider placing the pile near a water source to make moistening the pile easier. Avoid poorly drained

locations that may lead to the pile of compost becoming waterlogged. Soggy materials break down more slowly

and may smell.

Enclose the pile in a bin to keep the process neat and tidy. Purchase a compost bin or make your own from

fencing, concrete reinforcement wire or old heat-treated pallets.

Single bin wire composters are easy to assemble and move. Enclosed bins keep materials out of sight and

neighbors or less enthusiastic family members happy. Look for bins of sturdy UV resistant materials, ventilation

for efficient composting and designed for easy loading and unloading.

Tumbler composters are great for small spaces and make loading, unloading and turning much easier. The

closed system also keeps out rodents, wildlife and pets. Add garden waste, keep it consistently moist and give it

a turn. Continually adding fresh material slows the process, but you will still end up with good compost. Speed

up decomposition with two tumblers. Fill one tumbler with plant waste and let it cook, while collecting fresh

materials in the second. Not enough room for two? Try the Dual-Batch Compost Tumbler (gardeners.com),

Compost Twin or other tumbler system with two individual bins mounted on one support. Further speed up

results with an insulated unit like the Jorafoam Composter 125. The insulation ensures compost reaches higher

temperatures for more efficient composting.

And don’t let cold temperatures or a lack of space stop you. Everyone can convert kitchen scraps into nutrient-

rich compost with the help of red worms. Convert a plastic container filled with shredded paper into a home for

the worms and place to recycle plant based food scraps. Or dress things up with a stylish bin like the green

Worm Farm Composter and move the worms indoors for convenient recycling.

Add finished compost to your vegetable and annual gardens every spring to help build healthy soil and a

productive and beautiful garden. Or spread a one-inch layer over the soil surface of perennials gardens every

year or two to keep your flowers looking their best.

As you clear out the summer garden, put all that green debris to work. Convert it to rich compost for next year’s

garden. Then enjoy the many benefits it will have on your landscape.

Page 10: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

Sautéed Summer Squash with Red Pepper and Onion YIELD Serves 6 to 8 TIME20 minutes

Andrew Scrivani for The New York Times

This is the time of year when, no matter what part of the country you live in, tables at farmers’ markets are piled high with summer squash, mounds of it: yellow, light green and dark, round and long. This is a vegetable that expresses itself well in a wide range of dishes; just about every cuisine in the world knows how to show it off. It's an excellent low-calorie food, with only 19 calories per cup of raw squash. This dish is great on its own as a side dish, but it can also be incorporated into many other recipes.

Ingredients

2 tablespoons extra virgin olive oil

½ medium onion, chopped (about 1 cup chopped)

2 plump garlic cloves, minced

1 ½ pounds summer squash, cut in 1/2-inch dice

1 small red pepper, cut in 1/4-inch dice

Salt and freshly ground pepper

2 tablespoons chopped fresh parsley

Preparation

Heat the olive oil in a large, heavy skillet over medium heat and add the onion. Cook, stirring often, until tender, 5 to 8 minutes, and add the garlic, summer squash, red pepper, and about 3/4 teaspoon salt. Turn the heat to medium-high and cook, stirring, until the squash is translucent and the red pepper tender, about 10 minutes. Add freshly ground pepper, taste and adjust salt. Stir in the parsley and remove from the heat. Serve as a side dish, or use as a filling for a vegetable tart, gratin, or frittata.

Tips

Some types of squash cook faster than others. Zucchini cooks more quickly than pattypan, for example.

You can make this a few hours before you serve it and reheat it gently. If you’re using it as a filling for

another dish, it will hold for 3 days in the refrigerator. The squash may throw off some juice in the

refrigerator; just stir the dish well and use

Page 11: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

Weed Control in Ornamental Beds

Someone once mused, “It takes a lot of water to grow a garden, much in the form of perspiration”.

Quite likely, that remark was made after pulling or hoeing weeds on a warm, humid summer day.

Along with death and taxes, weeds are inevitability in the life of a gardener.

One of the first steps in effective weed control is to “know the enemy”. In general, weeds can be

grouped into three categories: grasses, sedges and broadleaved weeds. A knowledge of the life

cycle (e.g. annual versus perennial), reproductive habit, rate of spread, etc. of a weed is helpful

when attempting to control it. A number of good pictorial guides are available on the internet to

help with weed species identification.

The majorities of weeds that plague ornamental plantings are annuals and emerge from seeds in the

soil. For the average flower garden where a wide range of flowers are planted, weed control via

mulching should be considered. Mulches control weeds by depriving them of light. They provide an

easy, safe and “environmentally-friendly” way to accomplish weed control of an entire bed planted

with a number of different ornamental species. To control weeds using mulch, it should be applied

uniformly to a depth of at least one to two inches. Mulches should be from materials dense en ough

so they are not easily blown away. Pine bark, leaf mold or pine needles represent good choices.

In more permanent beds, landscape (weed control) fabric may be placed beneath the mulch to

provide even more effective weed control. After carefully placing the fabric over the bed to be

planted, cut an “H” into the fabric where plants are to be placed. After planting, fold the flaps of

the H back toward the plant, taking care not to allow any disturbed soil to remain on top the fabric

for fear of weed seed contamination. After plants have been installed, the fabric is ready to be

covered with organic mulch.

Perennial weeds such as quack grass, horse nettle and field bindweed not removed before planting a

bed may push their way through even deep mulches. Using the afore-mentioned landscape fabric

beneath mulches with help to deter them. However, some might still emerge through holes created

in the fabric when it was put in place or when the mulch was applied to cover it. At such times,

either hand weeding or the use of some type of herbicide may be needed to control them.

Unfortunately, there is no safe and effective herbicide that controls all types of weeds mixed among

garden plants without damaging the garden plants also. The use of a nonselective herbicid es (i.e.

one that kills every plant it contacts) very carefully applied to the weeds often is the only

alternative to hand removal. Perhaps the most widely used nonselective herbicide today is

glyphosate, which is available in several different trade names (e.g. RoundUp®). For those who

prefer organic weed control, horticultural vinegar (20% acetic acid) is an option worth

consideration as a non-selective herbicide.

When nonselective herbicides are used as “spot treatments” among desirable plants, extreme c are

must be taken during application to avoid contacting desirable plants. First, keep the sprayer

pressure low and use a coarse spray to make drift less likely. Apply herbicides when the air is very

still. Early morning or late even are good times. Finall y, a shield of some type placed between

target weeds and desirable plants is a good idea. If the shield is moved during the treatment of a

large bed, make certain to keep the same side toward target weeds, since herbicide accumulated on

the shield can damage desirable plants.

Wick applicators are a novel and relative new way to safely apply nonselective herbicides. These

devices feature materials such as a sponge that is kept continually moist with herbicide as it passes

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from a small bottle atop the applicator through its hollow handle. The herbicide-laden sponge is

rubbed against the leaves of target weeds while desirable plants are avoided. Spray drift thus is not

a problem.

Some of the most difficult and invasive weeds to control in ornamental beds are an nual grasses,

such as crabgrass. Several pre-emergent herbicides that may be used among garden plants to

prevent the germination of annual weed seeds are available commercially. Examples of materials

available for this purpose include trifluralin (Preen®), DCPA (Dacthal®), oryzalin (Surflan®),

pendimethalin (Halts®) and isoxaben (Gallery®). Unfortunately, some of the previous are not

readily available to home gardeners, since their primary use is by professional applicators. In all

cases, careful reading of the herbicide label is important, since not all herbicides can be used

among all ornamental plants and certain herbicides require special application techniques. For

example, trifluralin must be soil incorporated within 24 hours after application.

Among those pre-emergent chemicals more readily available to homeowners, DCPA and trifluralin

have been two of the most widely used in ornamental beds of annuals and perennials. As in the case

of all pre-emergent herbicides, they must be applied to the garden after ornamental plants are

established and before weed seedlings have emerged. Pre-emergent herbicides act by forming a

chemical barrier that prevents weed seeds from germinating and emerging. If the barrier is

disrupted in any way, the herbicidal action in that immediate area is lost.

There are relatively few selective herbicides (i.e. ones that kill only certain types of plants) that can

be used in ornamental beds to control grasses after the grasses have emerged. Classified as post -

emergent herbicides, they are applied uniformly across the planting and kill only grasses, leaving

broadleaved plants unharmed. Examples include sethoxydim (Poast®), fluazifop (Fusilade II®),

fenoxaprop (Acclaim®) and clethodim (Envoy®). Check the labels of each herbicide before using

for labeled bedding plants, susceptible weeds and any precautions that should be observed.

Although herbicides control a wide array of weeds, none is able to control them all. Therefore, total

weed elimination through the use of chemicals probably is not a realistic goal for gardeners.

However, even though herbicides may not control all weeds, they do control a large number of

them and can be real “labor savers” for many gardeners.

Trick or Treat Days are coming soon – be nice to the kiddies

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7 Ways to Use Coffee Grounds in the Garden

The next time you finish your morning coffee, think twice before you toss those used coffee grounds into the trash. Coffee grounds have many uses in the garden. They enrich the soil with nitrogen, potassium and other minerals, improve soil quality, and plant growth.

Here are 7 ways how to use coffee grounds in your garden. You may be amazed at how versatile this item is!

Page 14: GardenChatter - University of Missouriextension.missouri.edu/laclede/documents/Master Gardener... · 2016-11-30 · GardenChatter The Official Publication of Laclede County Master

1. Composting

Add coffee grounds to your composting bin. They’re a valuable source of nitrogen.

2. Pest Control

A barrier of coffee grounds around the plants may protect them from slugs and snails.

3. Cat Repellent

Put coffee grounds in the soil to keep cats away from digging in your garden.

4. Acid-Loving Plants

Place coffee grounds around the soil of your acid-loving plants such as roses, rhododendrons, fothergillas, holly, gardenias and so on. Coffee grounds increase acidity and nutrients in the soil.

5. Easy Fertilizer

Add 2 cups of coffee grounds to a 5 gallon bucket of water and allow it to steep overnight. Mixing these two ingredients is one of the simplest ways to make your own homemade fertilizer.

6. Mulch

Using coffee grounds as a mulch can help controlling weeds and keep your vegetable plants more hydrated during the heat of the day.

7. Boost Carrot & Radish Harvest

Double your harvest of carrot and radish, mixing your carrot and radish seeds liberally with coffee grounds.