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Shrubs

Philadelphus lewisii var. gordonianus

Lewis's mock orange

A large, upright shrub with slightly rough, oval leaves and single, white, four-petalled flowers with a light scent in late spring to early summer

Synonyms

Philadelphus lewisii 'Gordonianus'

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Ultimate height

2.5–4 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

East–facing or North–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)

Botanical details

Family: Hydrangeaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Bushy
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: Correct
Plant range: North America

How to grow

Cultivation

Will grow in most reasonable garden soils in sun or light shade

Propagation

Propagate by softwood or hardwood cuttings

Suggested planting locations and garden types

Cottage and informal garden
Low Maintenance

Pruning

Pruning group 2

Pests

May be susceptible to aphids

Diseases

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

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