Whole plant
Overall shape, height, branching and growth habit.
Flowers
Hydrangea growing guide
A deciduous flowering shrub producing large rounded or lacecap flower heads. It prefers moisture-retentive soil and protection from harsh afternoon sun in warm climates.
☠ Poisonous — Leaves, buds and flowers
Contains cyanogenic compounds. Do not use the flowers as food decoration.
Risk to: People · Pets
14-30 daysGermination
VariesHarvest
100 cmSpacing
0.3 cmSow depth
PartSun
HardyFrost
3.5 cm/weekWater
5-7.5pH
Planting calendar by climate
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Botanical reference
Compare the whole plant first, then check the leaf, flower and harvest detail to identify what Hydrangea should look like as it grows.
Leaf detail
Leaf shape, edges, colour and vein pattern.
Flower detail
Flower colour, structure and where blooms appear.
Harvest / detail
Fruit, root, seed, pod or the strongest identifying feature.
Good companions
No companion data yet.
Avoid near
No avoid list yet.
Growing note
Mulch deeply to keep roots cool and moist. Flower colour in many bigleaf cultivars changes with soil chemistry and aluminium availability.
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