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Shrubs


PAEONIA ROCKII (S)
 * THE RHS AWARD OF GARDEN MERIT (AGM) HELPS GARDENERS CHOOSE THE BEST PLANTS
   FOR THEIR GARDEN.

 * RHS PLANTS FOR POLLINATORS PLANTS
   
   THIS PLANT WILL PROVIDE NECTAR AND POLLEN FOR BEES AND THE MANY OTHER TYPES
   OF POLLINATING INSECTS.
   
   IT IS INCLUDED IN AN EVOLVING LIST OF PLANTS CAREFULLY RESEARCHED AND CHOSEN
   BY RHS EXPERTS. DIVIDED INTO 3 GROUPS THESE LISTS, LINKED BELOW, ARE
   MAINTAINED BY A TEAM OF RHS STAFF AND ARE REVIEWED ANNUALLY.
   
    * GARDEN PLANTS
    * WILDFLOWERS
    * PLANTS OF THE WORLD

Rock's tree peony

a lax deciduous shrub to 2m tall and wide, with dark green, divided foliage and
semi-double white flowers 25cm across in late spring and early summer, each
petal with a bold deep maroon blotch at the base

SYNONYMS

Paeonia suffruticosa subsp. rockii
Paeonia × suffruticosa subsp. rockii

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Learn more about My Garden

BUY THIS PLANT

   
 * Plant nurseries
   5 suppliers
   

SIZE



ULTIMATE HEIGHT

1.5–2.5 metres

TIME TO ULTIMATE HEIGHT

5–10 years

ULTIMATE SPREAD

1.5–2.5 metres

GROWING CONDITIONS


Chalk
Sand
Clay

MOISTURE

Well–drained

PH

Acid, Alkaline, Neutral

COLOUR & SCENT



StemFlowerFoliageFruitSpring White Purple Green Summer White Purple Green
AutumnWinter

POSITION


 * Full sun
 * Partial shade
   

ASPECT

South–facing or West–facing

EXPOSURE

Sheltered

HARDINESS

HARDINESS RATINGS

ALL RATINGS REFER TO THE UK GROWING CONDITIONS UNLESS OTHERWISE STATED. MINIMUM
TEMPERATURE RANGES (IN DEGREES C) ARE SHOWN IN BRACKETS

 * H1A: UNDER GLASS ALL YEAR (>15C)
 * H1B: CAN BE GROWN OUTSIDE IN THE SUMMER (10 - 15)
 * H1C: CAN BE GROWN OUTSIDE IN THE SUMMER (5 - 10)
 * H2: TOLERANT OF LOW TEMPERATURES, BUT NOT SURVIVING BEING FROZEN (1 TO 5)
 * H3: HARDY IN COASTAL AND RELATIVELY MILD PARTS OF THE UK (-5 TO 1)
 * H4: HARDY THROUGH MOST OF THE UK (-10 TO -5)
 * H5: HARDY IN MOST PLACES THROUGHOUT THE UK EVEN IN SEVERE WINTERS (-15 TO
   -10)
 * H6: HARDY IN ALL OF UK AND NORTHERN EUROPE (-20 TO -15)
 * H7: HARDY IN THE SEVEREST EUROPEAN CONTINENTAL CLIMATES (< -20)

H6

BOTANICAL DETAILS

FamilyPaeoniaceaeNative to the UKNoFoliageDeciduousHabitBushyGenus

Paeonia may be herbaceous perennials or deciduous sub-shrubs with large, divided
leaves and showy large bowl-shaped flowers, usually in early summer

Name status

Correct

Horticultural GroupShrubby peonies are sparsely branched deciduous shrubs leaves
divided into several finger-like lobes, and bowl-shaped flowers in late spring
or early summerPlant rangeChina

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HOW TO GROW

CULTIVATION

Best grown in neutral, humus rich soils, but slightly acid or slightly alkaline
soils are tolerated. Good drainage is essential. Ideally, plant in a sunny
position. Can be grown in light shade, but the plants may become straggly. Fully
hardy, but young foliage and flowers can be damaged by late frost. See tree
peony cultivation for further information.

PROPAGATION

Propagate by seed, seeds are doubly dormant needing two winters to germinate.
There is a good chance that the young plants will be true to type or similar.
Propagate by grafting, from semi-ripe cutting or try layering

SUGGESTED PLANTING LOCATIONS AND GARDEN TYPES

 * City and courtyard gardens
 * Cottage and informal garden
 * Flower borders and beds
   

PRUNING

pruning group 1

PESTS

May be susceptible to leaf and bud eelworm and soil-dwelling swift moth larvae

DISEASES

May be susceptible to a virus, honey fungus, Verticillium wilt, peony leaf
blotch and peony wilt



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