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Trees

Cornus kousa Flower Tower ('Zuilb1')

kousa [Flower Tower]

A small deciduous tree, to around 4m in 10 years, with a narrow, columnar habit and oval-shaped, deep green leaves. Large, creamy white flowers are produced in late spring, followed by strawberry-like fruits that ripen to pinkish-red. Leaves turn deep red in autumn

Synonyms

Cornus kousa 'Zuilb1'

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Ultimate height

2.5–4 metres

Time to ultimate height

5–10 years

Ultimate spread

0.5–1 metres

Clay

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

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)

Botanical details

Family: Cornaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Columnar upright
Genus: Cornus can be deciduous shrubs or trees, or creeping, woody-based perennials, some with brightly coloured young stems. Tiny flowers are borne in dense clusters, sometimes with showy bracts. Many have fine autumn colour
Name status: Trade

How to grow

Cultivation

Grow in fertile, humus-rich, well-drained, neutral to acid soil in sun or light shade. For more advice, see flowering dogwood cultivation

Propagation

Propagate by semi-hardwood or hardwood cuttings or grafting

Suggested planting locations and garden types

Architectural
Low Maintenance

Pruning

Minimal pruning required, see pruning group 1

Pests

Generally pest-free but may be susceptible to horse chestnut scale

Diseases

May be susceptible to cornus anthracnose and honey fungus

Get involved

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