Hydrangea
Hydrangea
Hydrangeas are deciduous shrubs with flowers in terminal round or umbrella-shaped clusters in colors of white, pink, blue, green, or even purple. If they flower blue, your soil is acidic (having less than 5.5 pH) and if they bloom pink, your soil is alkaline (higher than 6.5 pH). Hydrangea's loose and airy branching habits are especially suited to natural, woodland, and cottage gardens and borders. Only H. macrophylla is known to be toxic to humans.
How to Grow Hydrangea
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Growing from Seed
Growing hydrangeas from seed is not recommended.
Planting Considerations
Acidic soil results in blue flowers and basic/alkaline soil produces pink flowers. Add aluminum sulfate to acidify soil, and lime for basic/alkaline soil.
Harvesting
Hydrangeas are notoriously prone to wilt. The older the panicle (all florets are open), the less likely to wilt. Put cut stem immediately in cool water and let rest in a cool area.
Pruning
Check cultivar: hydrangeas flowering on old wood need to be pruned directly after flowering (or do not prune). Varieties blooming on new wood prune in dormancy- late fall or early spring.
