Hydrangea macrophylla 'Black Steel Zaza' (Black Steel Series) (H)
hydrangea 'Black Steel Zaza'
A compact deciduous shrub to about 1m high, with broadly oval, rich green foliage and dark red, almost black stems. Dome-shaped clusters of flowers are produced in summer, that open lime green, and develop to pink, lilac or blue depending on the pH of the soil
Size
Ultimate height
0.5–1 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Black Red | Green | ||
|---|---|---|---|---|
| Summer | Black Red | Pink Purple Blue | Green | |
| Autumn | Black Red | Green | ||
| Winter |
Position
- Partial shade
Aspect
East–facing or North–facing or West–facing
Exposure
Sheltered Hardiness
H4Botanical details
- Family
- Hydrangeaceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Bushy
- Potentially harmful
- Skin allergen. Wear gloves and other protective equipment when handling. Pets (dogs, cats): Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
- Genus
Hydrangea can be deciduous or evergreen shrubs, or self-clinging climbers, with flowers in clusters usually comprising both small fertile and more showy sterile flowers; often good autumn colour
- Name status
Unresolved
- Horticultural Group
- Hortensia hydrangeas (also known as mopheads) are compact bushy deciduous shrubs with broadly ovate leaves and rounded flower clusters composed almost entirely of showy sterile flowers
How to grow
Cultivation
Grow in any moist but well-drained soil in partial shade or grow in sun if soil remains reliably moist. Improve chalky soils with organic matter to support good growth. See shrubby hydrangea cultivation for further advice
Propagation
Propagate by softwood cuttings in early summer, or by hardwood cuttings in winter
Suggested planting locations and garden types
- City and courtyard gardens
- Coastal
- Cottage and informal garden
- Patio and container plants
- Cut flowers
- Flower borders and beds
- Wall side borders
Pruning
See pruning group 4 for further advice and video guide
Pests
May be susceptible to aphids, capsid bug, red spider mite, stem and bulb eelworm, vine weevil and scale insects
Diseases
May be susceptible to a leaf spot, powdery mildews, grey moulds (Botrytis) and honey fungus (rarely)
Get involved
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