Why Deadhead Hydrangeas? Deadheading hydrangeas redirects the plant's energy from producing seeds to instead focus on developing stronger stems, leaves, and roots for future growth and blooms.
When to Deadhead The best time to deadhead depends on the hydrangea variety. Bigleaf and oakleaf hydrangeas should be deadheaded in spring.
How to Deadhead Bigleaf and Oakleaf Hydrangeas For these varieties, locate the spent blooms and cut just above the first set of full-sized leaves beneath the flower head.
Avoid Deadheading Too Late Leaving spent blooms on the plant in fall can provide winter interest and protect emerging buds. It's best not to deadhead after mid-fall
Use Proper Pruning Techniques Make clean, diagonal cuts just above a set of healthy leaves to prevent rot. Disinfect pruners between cuts to avoid spreading disease.
Don't Worry About Overdoing It Removing all spent blooms, even if it's half the plant, won't damage the hydrangea - it will just remove the flowers' visual appeal.
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