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RHS Plant Trials and AwardsRHS Plant Trials and Awards

Spiraea japonica

with coloured leaves

Dian a M MillerKeeper of the RHS Herbarium

Bulletin Nu m ber 4

November 2003

Spiraea japonica

with coloured leaves

Dian a M MillerKeeper of the RHS Herbarium

Bulletin Nu m ber 4

November 2003

www.rhs.org.uk

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Spiraea japonica cultivars with coloured leaves are useful

shrubs for the small or larger garden, for a mixed border,

shrub border or as ground cover. In recent years a nu mb er

of new cultivars have been in troduced to th e horticultural

m arket and the Woody Plant Trials Subcom m ittee decided

to h old a trial to discover wheth er or not th e new cultivars

superseded t he existing on es.

Object ives of the Spiraea trial

The aims of th e trial included:

th e identification of the best and m ost distinctive

cultivars for th e RHS Award of Garden Merit

th e establishm ent of the correct nom enclature

th e collection of represent ative herbarium and

ph otographic records togeth er with detailed

descriptions, as a perman ent record.

the assessment of their hardiness, the degree, if any, of

reversion, resistance to disease and scorching

M e m b e r s o f W o o d y P l a n t T r ia l s S u b -c o m m i t t e e

Chairman: Peter Catt

Vice Chairman : Joh n Hillier

Members: Ch ris Brickell David Clark

Mau rice Fo st er Jo hn Gallagh er

Mich a el Hickso n Jo h n Hu m ph ris

Roy Lan caster Ch ris Lan e

Ch ris San ders Arch ie Skin ner

Visits

The RHS Woody Plan t Trials Subcom m ittee m et several

tim es at different season s over a period of four years an d

individual members visited at other times of the year. Each

entry was assessed for the h abit of the plant an d th e

attractiveness of the foliage through th e season in spring,

summ er and autumn .

Records

Records were mad e th roughou t th e trial of the foliage, the

degree of reversion (if an y) and of an y disease or frostdam age. More detailed description s of foliage colour

th rough t he season, habit an d oth er characteristics were

m ade as th e plants were photograph ed and m aterial

collected for the h erbarium .

Spiraea japonica with colou red leaves

RHS Plant Trials and Awards2

Cultivation in the tr ial

Sixteen nu rseries, ind ividuals and gardens submitted three

plan ts of each o f the 30 en tries of 18 different cu ltivars. All

were plant ed 1.2 m apart in a p repared site on th e trialgroun d in Wisley Village, in April 1998 except for 4 n ew

cultivars which were add ed a year later. The soil is free

draining, light an d sandy with a pH 6.5. The p lants were

irrigated after planting to aid establishm ent b ut n ot in

subsequent years. They were not sprayed against pest or

disease, no r fertilised except for a top dressin g at plan tin g.

The frost-dam aged dead sh oots caused by a severe late frost

in th e spring of 1999 were remo ved avoiding any reverted

shoots. Later in th e year, the flowers of on e plant of each

entry were remo ved in early August 1999, and in June in

2000, 2001 and 2002. In th e autum n of 2000 and early

spring 2001, the groun d was very wet, but non e of the

plants appeared to be u nd uly affected.

Origins of spiraeas with coloured leaves

The genu s Spiraea contain s about 70 species of deciduou s

shrubs which are foun d growing wild in th e temperate

region s of the Old an d New World.

The majority of those with coloured foliage are derived

from t h e variable species, S. japonica which was introduced

into cultivation from Ch ina by Robert Fortun e in about

1850. This species forms a small shrub to about 1.5 m high

with a lax habit. The flat term inal pan icles to 15 cm across,

of tiny pink or deep pink flowers each abou t 5 m m in

diameter are produced at th e ends of the current season s

growth. They appear first in early sum m er and con tinue

sporadically un til early autu mn . Generally these are

valuable trouble-free plants grown for their flowers. One

old cultivar is An th on y Waterer selected in ab out 1890

ago for its n arrow, deep green leaves somet ime splashed

with cream an d p ink. The m ore recent Little Prin cess, is a

small-leaved comp act plant suitable for groun d cover

(neith er were eligible for trial). S. japonica var. albiflora is

distinguished by its white flowers.

Goldflam e was probab ly th e first cultivar selected with

coloured instead o f variegated foliage which is tho ugh t to

h ave arisen as a bran ch sport o f An th on y Waterer. It h ascontinu ed to prove popular since its introduction over 30

years ago. It is a bush y plan t with bron ze-yellow foliage.

Since th is time several more cultivars have been raised with

foliage of bronze, gold or yellow, ma ny o f which are as a

FAR L EFT: Wo od y

Plant Trials

Subcommittee

LEFT: Spiraea Trial in

early sum mer

FRO N T C O V ER: Spiraea

japon ica MAGIC

CARPET Walbuma

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result of seedling selection s from Gold flam e. Seedlin gs

ten d to be less liable to reversion th an sports. Oth er

cultivars have a m oun ded shape wh ich may be derived

from Little Princess whereas the low-growing spreading

cultivars with tiny leaves almost certain ly owe th eir origin

to Nana, a plant wh ich has been kn own for many years.

The cultivars in th e trial are grown for their foliage wh ich

usually chan ges through the season from the first em erging

young growth to t he autu mn colours. The flowers range

from pale to dark purplish pink bu t m any p eople consider

th at th ey detract from th e overall foliage effect.

A recent n ew colour break is seen in Wh ite Gold with

yellow foliage but wh ite flowers derived from var. albiflora.

Related cultivars with variegated rather than coloured

foliage includ e S. thunbergii Moun t Fuji with very narro w

white m argined leaves and S.

vanhouttei Pink Ice withleaves mottled with wh ite (and sometimes) pink.

Cultivation

The coloured-leaved spiraeas will grow in an y well drained,

but m oisture retentive soil. Most will grow in full sun,

altho ugh th e leaves of a few cultivars ten d to scorch in full

sun an d a less sun ny p osition m ay be preferable. They may

be prop agated by softwood or semi-ripe cuttings. Rem oving

the flower h eads encourages new coloured growth but the

autum n colour may be lost if this trimm ing is carried out

too late. If th e shrubs become to o large, they m ay be

prun ed in winter or early spring wh ich will encourage the

n ew, youn g, coloured foliage.

Reverted shoots with green foliage are more vigorous and

should be rem oved before they overpower those with

coloured foliage.

Trial results

All entries in th e trial were found to be correctly nam ed. The

well kn own , older cultivars Goldflame and Gold Moun d

contin ue to perform well in gardens but in th e trial

Goldflam e show ed a slight ly greater ten den cy to revert in

comp arison with som e of the m ore recently selected

cultivars. while the foliage of Gold Mou nd was mo re pron eto scorching. As well as providing an opportunity for

assessing plan ts for the AGM, th e trial in dicated th at regular

but light pruning to m aintain a neat h abit and to avoid

straggly woody plan ts was impo rtant an d th at if th is was

carried ou t im med iately after flowerin g, the foliage colour

was prolonged into the autumn. However, it was noted that

severe prun ing of Mou n t Fuji an d Pink Ice m ight in crease

the possibility of reversion. As with many plants, the

weather conditions will affect the colour of the foliage.

Powdery mildew affected th e plant s especially in ho t an d

dry con ditions but th e AGM winn ers were th e least affected.

An unexpected observation was the effect of a very late,

but severe spring frost wh ich althou gh n ot causing lasting

dam age, did bu rn th e foliage of a large percentage of the

plants.

Spiraea japonica with coloured leaves 3

Spiraea japonica

White Gold

in early

summer

S. vanhouttei

Pin k Ice in

late spring

S. thunbergii

Mou n t Fuji

in summ er

Award of Garden Merit crit eria

The Award of Garden Merit requires a plant:

to be excellent for garden decoration

to be available from nurseries

to be of good con stitution

n ot to req uire specialist care

n ot to b e susceptible to p est or disease

not to be subject to reversion

H4 indicates that th e plants are hardy throughou t th e UK.

The following th ree cultivars wh ich received th e Award

of Garden Merit, are recognised as fulfillin g th ese

criteria an d h ave a good h abit and attractive foliage

throughout the season.

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Award of Garden Merit descript ion s

RHS Plant Trials and Awards4

S. jap onica

Candlelight

A G M ( H 4 ) 2 0 0 2

Su b m i t t e d b y L i ss

Forest N ursery

a n d Be e ch e s

N u r se r y

S. jap onica

Golden Princess

Lisp

A G M ( H 4 ) 2 0 0 2

Su b m i t t e d b y L i ss

Forest N ursery &

D a r b y N u r se r y

S t o ck L t d .

S. jap onica

Magic Carpet

Walbuma

A G M ( H 4 ) 2 0 0 2

Su b m i tt e d b y

W a l b e r t o n N u r se r y

In flower in early summ er In early autum n

In sprin g In sum m er In au tum n

In early summ er

A bushy shrub to 50-60 cm tall

by 90-100 cm w ide after 5 years

with orange brown stems.

Leaves bright b utt er yellow

151C-B-A in sprin g remain ing

gold yellow to green 10A flushed

green in summ er to greenish

yellow 145A often becoming

fiery red in autum n. Leaves

ovate t o elliptic, 4-8 x 2-4 cm ,

serrate, petiole c. 3 m m Flowers

in a pan icle to 10 cm across, mid

purplish pink 64D fading to

65D; 5 mm in d iameter; sepals

green, an th ers purplish pink.

The plants appeared m ildew

resistant in the trial with little

reversion and good lon g lasting

yellow coloured foliage throu gh

the season .

Raised at Liss Forest Nursery as aselected seedling from Goldfl am e

and introduced into cultivation in

1993.

A mou nd ed plant to over 60 cm

in 5 years with green ish bron ze

shoots. Foliage reddish bronze

on em erging in spring,

yellow151B-C, remaining bright

golden yellow 10A th rough t he

summ er and turning more

orange in aut um n. Leaves ovate

to elliptic serrate, to 6 x 2 cm,

petiole c. 2 m m . Flowers inpan icle to 15 cm or m ore across,

purplish pink 64C fading to

65C, 5-6 m m in d iameter, sepals

green t inged pink at m argin s,

ant hers pink to grey-blue.

A striking and consistent plant

with good golden foliage in

spring and summ er with a neat

comp act h abit. Resistant to

both mildew and reversion and

lower growing than Goldflame.

Found as a seedling by Peter Welch

and assumed to be a cross between

Gold Flam e and Litt le Princess

and introduced by Liss Forest

Nursery in 19 85 .

A very colourful mounded plant

with a dense compact habit to

70 cm t all by 100 cm wide after

5 years, with green stems. Youn g

leaves emerging bright red 173A

to 185C tu rnin g to yellow green

144A-B, becom ing gold t o lem on

green 1 51A-B to 15 3A as th ey

matu re and turn ing red and

orange in autumn. Leaves ovate,

3-4 x 2-2.5 cm, serrate, petiole c.

2-3mm.

Flowers in a pan icle to 15 cm

across, purp lish pin k 67A fading

to 68D, 6 mm in diameter,

sepals green tinged purplish at

tips, anth ers pink. The plant

remains low growing for the first

years but later becom es similar

in habit to GOLDEN PRINCESS Lisp

Not dissimilar to Sparkling

Carpet but m uch m ore vigorous

and produces darker pink

flowers followed by seed follicles

m ore freely. The plan ts showed

little reversion and mildew

during th e trial.

Raised by David Tristram of

Walberton Nu rsery, as a result of

the repeated selection from about1985 of 3 generations of seedlings,

originally from Gold Flame.

Introduced into cultivat ion 1994.

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5Spiraea japonica with coloured leaves

Spiraea japonica selection guidecoloured-leaved cultivars

Cult ivar Spring foliage Summ er foliage Autum n foliage Stem colour Other

Small, low-growing cultivars under 50 cm tall and over twice as wide as high; leaves small, the largest under 5 cm long

A l p i n e G o l d G r e e n i sh y e l lo w G r e e n i sh y e l lo w G o l d e n y e l lo w G r e e n V er y sm a l l l e av e s G o l d Ru s h G r e e n i sh y e l lo w w i t h G r e e n i sh y e l lo w Ye l lo w t o b r o w n G r e e n t i n g e d r e d L a rg e s t o f

red y o u n g t ip s t h e g ro u p

G o l d e n C a r p e t Ye l lo w t o b r o n z e Ye l lo w i sh g r e e n G o l d e n y e l lo w G r e e n i sh y e l lo w Fe w fl o w e r s

G r e e n C a r p e t G r e e n G r e e n Re d d i sh o r a n g e G r e e n Fe w fl o w e r s

Sp a r k l i n g C a r p e t G r e en i sh y e l lo w w i t h Ye l lo w i sh g r e e n Re d t o o r a n g e t o G r e e n t i n g e d r e d Fe w fl o w e r s

red y o u n g t ip s ye llo w

Mound-forming cultivars to 70 cm tall, mounded 1.5-2 times as wide as tall; leaves medium, the largest not over 7 cm long

C a n d l el ig h t B ri g h t b u t t e r y e ll o w G o l d e n y e ll o w G o l d e n y e ll o w O r a n g e b r o w n

G l e n r o y G o l d e n y e l lo w B r ig h t y e l lo w G o l d e n y e l lo w Re d d i sh b r o w n Sm a l le st o f

G o ld b u n t in g ed g reen g ro u p

G o l d e n D o m e Ye l lo w t o g o l d Ye l lo w i sh g r e e n Ye l lo w G r e e n r e d

G o l d M o u n d Ye ll o w t o g o l d G r e e n ish y e ll o w Ye ll o w Ye ll o w i sh b r o w n

G O L D E N PRINC ESS G o l d b r o n z e G r e e n ish y e ll o w O r a n g e t o g o l d G r e e n ish b r o w n L ar g e st o f g r o u p

Lisp t in g ed b ro n ze

M AGIC C ARPET G r e e n i sh y e l lo w w i t h Re d a n d g r e e n Re d t o o r a n g e G r e e n I n i t i al ly v e r y fl a t

W alb u m a b r ig h t red yo u n g tip s

W h i t e G o l d C l ea r g r e e n ish y e ll o w Ye ll o w t o l im e O r a n g e t o y e ll o w G r e en i sh b r o w n W h i t e fl o w e r s

g r e e n

W y n d b r o o k G o l d t o b r o n z e Ye l lo w g r e e n O r a n g e b r o w n P al e o r a n g e t o L e av e s sm a l l

G o ld b ro w n

Large bushy cultivars over 8 0 cm t all, bushy less than 1 .5 t imes as wide as tall; leaves large, t he largest over 7 cm long

Fire l ig h t Red t o b ro n ze Red d ish g reen Pu rp lish red an d O ran ge Ver y red -

b ro n ze b ro n ze fo l iag e

G o l d fl a m e G o l d e n b r o n z e G r e e n t o b r o n z e Ye ll o w t o o r a n g e O r a n g e t o b r o w n L ar g e st p l a n t

w i t h re d d e r

y o u n g l e a v e s

B le n h e i m G r e e n v a r ie g a t e d G r e e n w i t h f a d i n g B r o n z e Ye l lo w i sh g r e e n L a rg e l e af w i t h

c ream an d p in k v ar ieg at io n jag g ed m arg in

Variegated cultivars of oth er species

S. t hunber g i i L e av e s l in e a r , g r e e n e d g e d c r e am t h r o u g h t h e s ea so n ; p l a n t w i t h u p r i g h t h a b i t ; st e m s o r a n g e / b r o w n

M o u n t F u j i

S. v a n h o u t t e i L e av e s g r e e n sp e c k l e d w h i t e a n d s o m e t i m e s t i n g e d p i n k ; p l a n t w i t h u p r i g h t h a b i t ; st e m s b r o w n / p i n k

Pink Ice

Low-growing group

Leaves L ar g est u n d er 5 cm

Habit W i d t h a t l e a st t w i ce h e i g h t

Mound-forming group

L ar g est 5 -7 cm

W i d t h 1 . 5 t o 2 t i m e s h e i g h t

Large bushy group

L ar g est o ver 7 cm

W i d th l ess th an 1 . 5 t i m es as h e i g h t

over80cm

50

80cm

under

50cm

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AGM of 1993 was rescinded as the plants in the trialshowed a lot of reversion an d th e foliage tend ed to bu rn in

hot dry conditions.

It is thou ght to h ave originated in Can ada abou t 15 years ago.

Gold Rush

A dwarf low-growing p lant to 40 cm tall with tiny rusty-

red leaves turn ing to but ter yellow. Flowers rose pink.

Raised by Rush fields Nu rsery in 19 82 as a sport of Nan a, and

introduced in 1987.

Sparkling Carpet

A very small low-growing compact plant to 15 cm tall after

4 years, with tin y leaves which are reddish as th ey un foldturn ing light green edged with red. Sparse light pink

flowers with a darker m argin an d centre do n ot produce

follicles.

Th e result of a breeding program me in Canada using Goldflam e

and Nana.

White Gold

A bushy p lant to 60 cm tall after 4 years which retains it

yellow foliage th rough the season bu t exceptionally has

white flowers. The foliage has a tendency to scorch so

probably does better in a less sunny position

The result of deliberate crosses between S. japo n ica var.

albiflora and Candlelight at Liss Forest Nursery produced aplan t wit h wh ite rather than pink fl owers w hich was in troduced

into cultivation in 2001 .

Wyndbrook Gold

A small neat mou nd ing plant to abo ut 60 cm tall with gold

to bron ze spring foliage becoming m ore yellow in summ er

turn ing orange yellow in au tum n. Flowers deep pin k.

This chance seedling between Nana and Goldflame was raised

by Chris Pattison of Pendock, Glos; more compact than Goldflame.

Other spiraeas with variegated leaves

S. v a n h o u t t e i Pink Ice

An u prigh t bushy plant to 140 cm t all with broad tooth edleaves speckled with cream , pink an d green becom ing

greener in summ er. Youn g shoots pink an d flowers white.

Shoot tips damaged in severe winters and very subject to

reversion especially after hard pruning.

Originally imported as S. cantoniensis Variegata from Japan

but subsequently namedS. vanhouttei and introduced by

Liss Forest N ursery as Pink Ice in 1 99 0. It m ay be foun d u nder

the synonym Catpan.

S. t h unbe rg i i Mount Fuji

A lax upright shrub to 120 cm tall with n arrow leaves

edged white an d sometim es flecked pink becomin g greener

in sum m er. Youn g sh oots pin k and flo wers white. Foliage

was subject to reversion, especially if hard pruned and was

affected by late spring frosts and sun scorch.

Raised Dr Yokoi of Ch iba Un iversity, Japan .

Alpine GoldA very small, comp act plant to 40 cm tall with tiny leaves

and with good, bright gold foliage in spring but becom ing

duller during the summer. Flowers pale pink.

Its origin is un certain .

Blenheim

A large bushy shrub to 90 cm tall with deeply double serrate

leaves variegated with cream, pink an d green tu rnin g to

bron ze in th e autum n . Flowers deep pin k. Th is cultivar

appeared un stable an d subject to reversion .

Firelight

A m oun d-formin g plant to 80 cm with rich red-orange

youn g foliage turning golden yellow in sum mer an d deep

orange to pu rplish red in autu m n. Flowers deep pink.

A seedling of Goldfl am e selected by Liss Forest Nursery in 1 99 3.

Glenroy Goldbun

A compact m oun ded plant to 60 cm tall with golden spring

foliage becoming yellow tinged with green in summer but

mo re golden again in autu mn . Flowers bright p ink.

A selected seedlin g of Glenroy Gold (no lon ger grown but i tself

a seedling of Goldflame) in 1998 by Cliff Dadd of

Balla lm eannagh Ga rdens, Isle of Man.

Golden Carpet

A very small low-growing com pact plan t to 15 cm tall after 4

years with tin y leaves which are golden yellow through out

th e season . Sparse pale pink flowers with a darker margin do

not produce follicles.

Th e result of a breeding program me in Canada usin g Goldflam e

and Nana which also produced Green Ca rpet to 20 cm tall

after 4 years. This is a green leaved cultivar with reddish orange

autumn f oliage and is slightly larger and m ore vigorous.

Golden Dome

A low-growing m oun ded plant to about 70 cm tall with

light golden foliage becoming greener in summer. Flowers

pin kish red fadin g to pa le pink. Very similar to Gold

Moun d but with greener stems.

Raised by Jackdaws N ursery.

Goldflame

A very hardy large bushy shrub to 100 cm tall with leaves

emerging rich orange red gradually turning to yellowish

green in sum m er becomin g orange to red again in autum n.

Flowers deep rose red. Th e AGM of 1993 was rescin ded

because the p lant showed m ore reversion in t he trial than

newer cultivars and was more affected by m ildew in ho t

dry conditions. Probably the first coloured foliaged cultivar

to be introduced into cultivation in about 1970.

Gold M ound

A very hardy compact m oun ded plant to 55 cm tall with

small leaves golden yellow th roughou t th e season but

slight ly greener in sum m er. Flowers few, pale pin k. The

Other cultivars ofS. ja ponica

RHS Plant Trials and Awards6

N o t e s : T h e h e i g h t s g i ve n a r e a ft e r 5 ye a r s g r o w t h i n t h e Tr i al , u n l e ss sp e c i fie d . T h e s i ze s a r e r e la t i ve an d d e p e n d e n t o n g r o w i n g

co n d i t i o n s . Fo l i a g e co l o u r s ca n b e a f f ec t e d b y w e a t h e r e sp e c i a ll y h e a t a n d d r o u g h t .

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RHS Trials

The trials of the Royal Horticultural Society have been an

intrin sic part of th e Society sin ce its foun dation . Today

th ere are 13 com m ittees m ade up of mem bers with expertisefrom all aspects of the h orticultural world. About 3,000

ent ries in 60 trials of differen t groups of h erbaceous plants,

vegetables, fruits, ann uals, bulbs and wood y plan ts, are

h eld each year. They com bine, as no oth er organisation

could, the best of British horticultural experts (the committee

m emb ers) with t he exp ertise of th e RHS staff in th e garden

and science departments. The best plants within each group

receive th e Award o f Garden Merit. Th is award (AGM )

indicates that the plant is recomm ended by th e RHS for

garden d ecoration. The plan ts are also th e subject of

scrutiny for their correct nam es, an d are described in detail,

ph otographed an d specimen s prepared for storage in th e

RHS Herbarium.

Senders of plants to the Spiraea trial

Ballalheannagh Gardens, Glen Roy, Lonan, Isle of Man

IM4 7QB

Beeche s Nursery, Ashdon, Essex CB10 2HB

Bloom s of Bressingham Ltd , Diss, Norfolk IP22 2 AB

Bridge m ere Nurseries, Nantwich, Cheshire CW5 7QB

Coo lin gs Nursery Ltd, Rush m ore Hill, Kn ockh olt, Ken t

TN147NN

Darby Nursery Stock Ltd, Meth wold, Norfolk IP26 4PW

Fairhaven Nursery, Clapworthy Cross, Chittleham pton ,

Devon EX37 9QT

Goscote Nurseries Ltd, Cossington, Leicester LE7 4UZ

Holden Clough Nursery, Holden, Lancs BB7 4PF

Liss Forest Nursery Ltd , Greatham , Hants GU33 6HA

Marwo od Hill Gardens, Barn staple, Devon EX31 4EB

Miles Nurseries, Hob y, Leicestersh ire LE14 3 EA

Noresco, 2914 Boulevard Cur-Labelle, Laval (Quebec),

Can ada H7P 5RS

Notcutts Nurseries, Woodbridge, Suffolk IP12 4AF

Rumsey Gardens, Clanfield, Hants PO8 OPD

Walberton Nursery (Farplants), Walberton, Sussex BN18

OAS

Acknowledgements

Herbarium specimen s by Barry Phillips and Susan Grayer.

Photographs by Tim Sand all, Graham Titchmarsh and

Barry Ph illips. Copyrigh t Royal Ho rticultural Society

Spiraea japonica with coloured leaves 7

RHS Herbarium

The h erbarium of th e RHS is at Wisley where, like the

Library, it is used con tinu ally as an essen tial reference t ool

by the botanists and others working for the Society. Thisherbarium is one of a small num ber in th e world dedicated

to horticultural plants but few are actively expanding. At

present th e collection contain s about 80,000 herbarium

specimen s, 30,000 phot ographic images and 4000

paintings of plants together with additional m aterial such

as seeds and con es. Material is collected from th e garden s,

shows and special collection s and well prepared an d

carefully curat ed, dried, p ressed specim en s from RHS trials

are an important addit ion.

The Herbarium is leading an internation al initiative to

prepare specim en s of all new cultivars as th ey are

introduced wh ich will help to reduce the n um bers of

incorrectly nam ed plants in th e future. Many of th eseStandards come from RHS trials. Further information about

Stan dards m ay be viewed on th e RHS website

(www.rh s.org.uk). The RHS h erbarium is an in valuable

repository of preserved specimens, illustrations and

historical data con cerning ornam ental plants for today and

for the future.

Stand ard specimen ofSpiraea japonica Candlelight

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We welcom e com m ent s on an y aspect of th is report.

Trials Office, RHS Garden, Wisley, Woking, Surrey GU23 6QB

e-m ail: trials@rh s.org.uk

www.rhs.org.uk/trialsReg charity n o. 222879

All text an d im ages Copyright RHS 2003

ISSN: 1477-9153 (print)

ISSN: 1447-9161 (online)

RHS BULLETINS

Canna: Septem ber 2003

Lavender (hardy): July 20 03

Potentilla (sh rubb y): July 200 2