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Climber Wall ShrubRoses

Rosa 'Polyantha Grandiflora' (Ra)

rose 'Polyantha Grandiflora'

A large, vigorous, rambling rose to 7m in height. Arching stems bear glossy, mid-green leaves with coppery overtones and cascading clusters of single to semi-double white flowers 6cm wide. The lightly-scented, white flowers are contrasted by golden-yellow stamens; pea-sized orange-red hips follow in autumn

Synonyms

Rosa gentiliana misapplied

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Ultimate height

4–8 metres

Time to ultimate height

5–10 years

Ultimate spread

2.5–4 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained, Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

South–facing or North–facing or West–facing or East–facing

Exposure

Exposed or 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)

Botanical details

Family: Rosaceae
Native to the UK: No
Foliage: Deciduous
Habit: Climbing
Potentially harmful: Fruit are ornamental - not to be eaten. Wear gloves and other protective equipment when handling. Pets: Fruit are ornamentl - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Rosa can be deciduous or semi-evergreen shrubs or scrambling climbers, with usually thorny stems bearing compound pinnate leaves and solitary or clustered flowers. Flowers may be followed by showy red or purple fruits in some varieties.
Name status: Accepted
Horticultural Group: Rambler roses are vigorous shrubs with long, arching, thorny or smooth stems carrying glossy foliage and large sprays of small, single or double, often fragrant flowers in early summer

How to grow

Cultivation

Grows best in fertile, humus-rich, moist but well-drained soil in a sunny, open position, but tolerates a wide range of conditions. Mulch in late winter and, to improve flowering, apply a balanced fertiliser in late winter or early spring

Propagation

Propagate by semi-ripe cuttings in late summer or hardwood cuttings in autumn

Suggested planting locations and garden types

Cottage and informal garden
Wildlife gardens
Flower borders and beds
Wall side borders
Banks and slopes

Pruning

Pruning group 18 (rambler roses); don't prune after flowering if fruits (hips) are required

Pests

May be susceptible to aphids, rose leafhopper, glasshouse red spider mite, scale insects, caterpillars and rose leaf-rolling sawfly. Deer and rabbits can cause damage

Diseases

May be susceptible to rose black spot, rose rust, replant disease, rose dieback, and rose powdery mildews. May also be susceptible to disorders rose blindness and flower balling and sometimes honey fungus

Get involved

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