Preventing Floppy Blooms on 'Vanilla Strawberry' Hydrangea: Pruning for Stronger Stems

Q: I have Vanilla Strawberry hydrangeas that look beautiful in June/July but when heavy rain hits with lots of blooms, they droop and can't hold the weight. Nursery expert said cut knee-high in February. What should I do?

Vanilla Strawberry is a panicle hydrangea, not a common one. It blooms on new wood yearly, so some prune hard each spring for more shoots and flowers.

But removing most of a stem causes fast, weak growth and floppy flowers.

I'd prune to 1 foot high in February. When new sprouts are 1 foot long with a couple of stem buds, clip the tip of each. Resulting growth will be held higher; blooms can droop without touching ground.

In subsequent years, don't remove thick lower stems. They'll form a sturdy scaffold for new growth to keep the bush upright.