hydrangea 'Ō-amacha'
Also known as: Information to be completed
A bushy shrub to around 1.3m high with narrowly-ovate green leaves and flowerheads comprising small, blue or pink, fertile florets surrounded by sterile white florets that become stained and speckled pinkish-red with age

Scientific classification
- Species
- hydrangea 'Ō-amacha' (Hydrangea serrata 'Ō-amacha')
- Genus
- Hydrangea
- Family
- Hydrangeaceae
- Skin allergen. Wear gloves and other protective equipment when handling
- Toxicity
- Shrubs
- Plant type
- 1-1.5 metres
- Height
- 1-1.5 metres
- Spread
- Deciduous
- Foliage
- Bushy
- Habit
- Spring · Summer · Autumn
- Season of interest
- Partial shade
- Sunlight
- Information to be completed
- Ideal temperature
hydrangea 'Ō-amacha' pictures
Distribution of hydrangea 'Ō-amacha'
Distribution map
Information to be completed
Information to be completed
Culture
Information to be completed
Toxicity
Skin allergen. Wear gloves and other protective equipment when handling
Quick identification of hydrangea 'Ō-amacha'
Information to be completed
hydrangea 'Ō-amacha' care guide
- Keep soil consistently moist, especially in warm weather
- Watering
- Partial shade
- Sunlight
- Information to be completed
- Ideal temperature
Watering
Keep soil consistently moist, especially in warm weather
Fertilizing
Hydrangea feed in spring and again early summer
Pruning
Use the method for the hydrangea type: remove faded mophead flowers to the first healthy bud pair; paniculata and arborescens may have last year's stems shortened to healthy bud pairs. Climbing hydrangeas need overlong shoots trimmed after flowering. Most types are pruned in late winter or early spring; climbing hydrangeas are pruned after flowering in summer.
Propagation
Propagate by softwood or hardwood cuttings
Growing
Grow in moist but well-drained soil in partial shade or in full sun if soil remains reliably moist
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Common pests and diseases
Diseases
May be susceptible to a leafspot, grey moulds, powdery mildews and honey fungus
Pests
May be susceptible to aphids, capsid bug, hydrangea scale and vine weevils
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