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Based on 20,000+ analyzed cases
Winter Protection on hydrangea
What's Happening
Exposure to severe winter frosts can kill the above-ground canes and dormant flower buds on old-wood blooming hydrangeas, even if the roots survive.
How to Fix It
- 1
Assess canes in spring for live green tissue; do not prune until new growth confirms which wood is dead.
- 2
If canes are dead, prune them to the ground; the frost-tolerant root system will push new growth, though it may not bloom that year.
How to Prevent It
Apply a thick layer of mulch (leaves, straw, or pine bark) over the crown in late fall. For harsh climates, wrap the shrub with burlap.
Related Problems
Frequently Asked Questions
What causes winter protection on my plant?
Exposure to severe winter frosts can kill the above-ground canes and dormant flower buds on old-wood blooming hydrangeas, even if the roots survive.
How do I fix winter protection?
Assess canes in spring for live green tissue; do not prune until new growth confirms which wood is dead.. If canes are dead, prune them to the ground; the frost-tolerant root system will push new growth, though it may not bloom that year..
How do I prevent winter protection from happening again?
Apply a thick layer of mulch (leaves, straw, or pine bark) over the crown in late fall. For harsh climates, wrap the shrub with burlap.