Perennials for Late Season Color

Dennis Morgeson

Agent For Horticulture

Washington County

What are perennials?

0 Plants that live for several years

0 Mostly herbaceous in nature

0 Multiply by seeds and increase in size of parent plant

0 Most grow from a crown, stolons or rhizomes

0 Some live for a few years, some for decades

Perennial Considerations

Design issues:

0 Height, placement in the bed or border

0 Color combinations

0 Continuation of bloom

0 Foliage textures

Achillea filipendulina- Yarrow

0Flowers in late spring to summer

02-3 feet tall and wide, dwarf varieties 8-15 inches

0Few pests

0Borders, cut flowers, dried

0Cuttings or division in spring or fall, some by seed

0Varieties-Coronation Gold, Gold Coin Dwarf, Goldie, Moonshine

0Trim back after bloom for rebloom

Achillea millifolium- yarrow0 Wider range of colors

than previous species

0 Generally grows no more than 2 feet tall

0 Spreads faster, can become aggressive

0 Performs well in dry areas

0 Lots of varieties such as Paprika, Strawberry Seduction, Pomegranate, Summer Wine, etc.

0 Trim back after bloom for rebloom

Agastache Varieties

Black Adder Blue Fortune Golden Jubilee

Kudos Gold Raspberry Summer

Amsonia hubrichtii

Aster spp. - Asters

0Flowers in blues, violets, whites in summer and fall

01-6 feet tall, taller varieties must be staked

0Powdery mildew is the major pest

0Used for borders and cut flowers

0Propagate by division in spring

Asters

Blue Autumn Little Carlow

Winston Churchill

Aster tataricus “Jindai”

Baltonia asteroides (False Aster)

0 Grows 3-5 feet tall and wide will need staking

0 Plant in full to part sun, tolerant of a variety of soils

0 This is an undemanding native loved by butterflies!

0 Blooms August until frost

Pink Beauty

Snowbank

Ceratostigma plumbaginoides –leadwort

Plant in full to part sun

Will tolerate some shade

but prefers full sun in

average soil

Generally late to emerge

but blooms from mid

summer until frost and

gives a nice fall color

Wiry semi woody

groundcover, grows 9-12

inches tall and 18 inches

wide

Echinopsis0 Grows 3-4 feet tall by 2

feet

0 Full Sun

0 Poor to average soil

0 Well drained

0 Blooms early, mid, late summer

0 Blue Flowers

Blue Glow

Coreopsis -tickseed

0 Many species with varying plant habits

0 New colors and all bloom for an extended period, also varying foliage types

0 Dead head to extend bloom season, cut back hard after spring bloom for later summer flowering

0 Best divided regularly to maintain vigor

Coreopsis

Cosmic Eye 12-20”Crème Brulee 8-12” Full Moon 18”

Coreopsis

Jethro Tull Red Satin Route 66 Sienna Sunset

Sweet Dreams

Zagreb Moonbeam

Echinacea – Coneflower

0Varied flower colors but the purple and white still seem hardier0Varying heights from 1-5 feet tall0Major pest is powdery mildew0Used as border or cut flowers0Divide clumps in spring or by seed0Deadhead for repeat bloom0Yellow Finch will eat seeds if allowed to mature

Coneflower

Cheyenne Spirit Firebird Double Decker

Leilani

Pallida*

Paradoxa* Secret Pride Pink Poodle

Eupatorium coelestinum –hardy ageratum

0 Very vigorous plant, particularly in moist soils

0 Cut back in summer to shorten and increase flowering

0 Divide regularly

Wayside

Eupatorium rugosum

0 Grows 3-5 feet tall and 3 feet wide

0 Mid summer to fall bloom

0 Full Sun to half sun

0 Normal soil even clay

0 Attracts butterflies, wet site tolerant as well

0 Purple green foliage also ads interestChocolate

Eupatorium purpureum* – Joe pye weed

0 Stately perennial can grow to 10‘ Native plant attracts butterflies

0 Smaller dwarf versions are available

0 May reseed around the garden

0 Enjoys wet locations but will grow in average garden soil

Joe Pye Weed

Gateway 6’ Fistulosum* 3-4’ Little Joe 3-4’

Euphorbia - spurge

0 Many different forms, some evergreen

0 Very tolerant of poor dry soils

0 Milky sap may be an irritant to skin or eyes

0 Deer resistant and drought tolerant

0 Often self seeds

Robbiae

Euphorbia

Bonfire Polychroma* Tiny Tim

Jade

DragonChameleon

Gaillardia x grandiflora –blanket flower

0 Very long bloom period in summer

0 Tends to be short lived

0 Excellent for dry areas

0 Often seeds itself in good soils

0 Deer resistant

0 Attracts butterflies

0 Drought Tolerant

Gaillardia

Bright Bicolour Yellow Peach Sun Flare

Red Sun Sun

Devil

Helenium autumnale-sneezeweed

0 Tall perennial valued for its fall blooms in yellow orange and red (newer shorter varieties)

0 Prune in summer or stake to support

0 Adaptable plant tolerates many soil types

0 Native

0 Can reseed

Sneezeweed

Mardi Gras

Moerheim

Beauty Autumnale*

Tiny Dancer

Red Jewel Carnival

Double Trouble

Heliopsis helianthoides

0Yellow flowers in summer and early fall

03-4 feet tall

0Few pests

0Used as a border or cut flower

0Propagate by seed or division

0Cut back after first flush of blooms for a later summer flush.

Heliopsis helianthoides

Summer Nights Summer Sun Lemon Queen

Lorraine

Sunburst

Asahi

Hibiscus moscheutos –Hardy Hibiscus

White, red, pink and bicolors in summer, newer varieties bloom until late fall3-8 feet tall, taller ones require stakingMajor pests are Japanese beetles and caterpillarsUsed as border plantsPropagate by division or seedPrefers moisture but tolerates drought

Hardy Hibiscus

Fantasia Fireball Kopper King Lady Baltimore

Lord

Baltimore Plum Crazy

Hardy Hibiscus

Robert

Flemming

Sweet Caroline Moscheutos* Blue River II Heartthrob

Cherry

Cheesecake

Midnight

MarvelSummer Storm

Hosta

Empress Wu

Hosta

Coast to Coast Designer Genes Curly Fries

Etched Glass Wu-La-La Blue Elf

Reblooming Bearded Iris

Various colors and bicolors with large flush of blooms late spring, and sporadic bloom late summer into fall.

2-4 feet tall

Main pest is iris borer

Used in borders

Propagate by division in fallConcertina

Bearded Iris

Double Your Fun Penny LanePeach Jam

Violet TurnerImmortalityRed Hot Chili

Perovskia atriplicifolia -Russian Sage

0Blue flowers in summer

04-6 feet tall, shrubby

0Few pests

0Used as a border

0Propagate by cuttings, division, or seed

Little Spire

Filigran

Superba

Physostegia virginiana –obedient plant

0 Native plant in pink or white

0 Late summer/fall

0 Spreads aggressively in good soils

0 Tolerates moist areas

0 Good cut flower

0 Divide frequently

Miss Manners

Pink Manners

Vivid

Rudbeckia fulgida - Black-eyed Susan

0Yellow flowers in summer to fall

02-3 feet tall

0Powdery mildew is the main pest problem

0Used as a border, cut or meadow flower

0Propagation by division or seed

Goldstrum

RudbeckiaFulgida Little Goldstar

lancinata*Autumn Sun

maxima*

Henry

Eilers

Salvia nemorosa – Garden Sage

0 Reliable plant with long bloom season in late spring

0 good for drier areas

0 Aromatic foliage

0 Cut back after bloom for a second, smaller flush of bloom

Blue Hill

Garden Sage

Caradonna

New Dimension

BlueMarcus May Night

Sensation

Deep Rose

Plumosa

Swan Lake

Sedum spp. - Stonecrop

0Yellow, orange, red flowers in summer but generally grown more for foliage

03-8 inches

0Few pests

0Used for edging, ground covers, rock gardens

0Propagation by division or seed

Sedum spectabile - Showy Sedum

0Pink, red, white, lilac flowers in late summer and early fall

012-18 inches tall

0Few pests

0Used as a border, edging, cut flower or dried

0Propagation by division or cuttings

0Drought tolerantAutumn Joy

SedumAutumn Charm

Autumn

Fire Blade Runner Blue Spruce Brilliant

CarlCherry TartDragons TongueMunstead RedMurale

SedumNeon Pool Party

Purple

Emperor

Red Cauli

T RexTurkish

Delight

Mendoza

Heuchera

0 Full Sun, Part Shade, Full Shade depending on varieties

0 Multiple leaf colors

0 Flowers red, pink, or white

0 Bloom time based on variety April –August

0 6” to 3 feet tall

Fire Alarm

Heuchera

Appletini Black Pearl Wild Rose

Peachberry Ice Pretty Pistachio Silver Gumdrop

Vernonia0 Grows 4 feet tall and

wide

0 Full Sun

0 Grows in average soil

0 Hardy rugged native

0 Will not tolerate consistently wet conditions but does well in rain garden situations

0 Once established drought tolerantSouthern Cross

Japanese Anemone

0 Grows 2-4 feet tall

0 Full sun to half shade

0 Tolerant of wet sites

0 Grows in normal, clay, or acidic soils

0 Blooms early to late fall

Pamina

Japanese Anemone

Whirlwind Prince Henry Margarette

Honorine JobertMax VogelPocahontas

Truly Hardy Chrysanthemum

0 Loosely called “Korean Mums”

0 Grows from 1-4 feet tall

0 Full Sun

0 Grows in normal, clay, or acidic soil

0 Will not tolerate conistently wet conditions

0 Blooms early to mid fall

Sheffield Pink

Varieties

Venus Samba Mei-kyo

Emperor of China Cambodian Queen Brandywine Sunset

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Questions?