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Hydrangea

Hydrangea macrophylla

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Hydrangeas produce spectacular large flower heads in pink, blue, purple, or white. Soil pH determines flower colour — acidic soil produces blue flowers, alkaline soil produces pink.

Hydrangea

Common Problems

Select the problem your Hydrangea is experiencing to get a treatment guide.

Care Guide

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Light
Morning sun, afternoon shade. Avoid harsh midday sun.
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Water
Deeply and regularly. Dislikes drought. Mulch to retain moisture.
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Soil
Moist, well-draining, humus-rich soil. pH affects colour.
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Fertiliser
Balanced slow-release in spring. High potassium for blooms.
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Temperature
Hardy to about -15°C. Buds frost-sensitive.
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Humidity
Moderate to high.

Toxicity

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All parts toxic if ingested. Contains cyanogenic glycosides.

Common Diseases

Common Pests

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Frequently Asked Questions

Why isn't my hydrangea flowering?

Usually pruning at the wrong time, removing flower buds set the previous year. Prune only after flowering.