Philadelphus White Rock ('Pekphil')

RHS Plant Profile

mock orange [White Rock]

Synonyms

Philadelphus 'Pekphil'
Philadelphus 'White Rock'

Shrubs

Buy this from Plant Nurseries
2 Suppliers

A free-flowering upright deciduous shrub about 1.5m tall, with arching branches bearing oval dark green leaves to 4cm long. Large, lightly-scented single or semi-double white flowers to 6cm across, appear in racemes of 3-7, in early summer, the branches often bowed and weighed down with flowers

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Clay, Sand

Max Height

1-1.5 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 1.5-2.5 metres
Max Height: 1-1.5 metres

Growing Conditions

Chalk Loam Clay Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: East–facing or 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

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Hydrangeaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Spreading branched
Genus: Philadelphus are deciduous shrubs with simple, opposite leaves and bowl-shaped, usually fragrant flowers which may be solitary or in small panicles or racemes in summer
Name Status: Trade

How to Grow

Cultivation

Grow in any fertile, well-drained soil in sun or partial shade. See philadelphus cultivation for further advice

Propagation

Propagate by softwood cuttings in summer or hardwood cuttings in autumn or winter

Suggested planting locations and garden types

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

Pruning

Pruning group 2

Pests

May be susceptible to aphids

Diseases

May be susceptible to honey fungus (rarely) and powdery mildews