How to Properly Prune Hydrangeas
How to Properly Prune Hydrangeas
How to Properly Prune Hydrangeas. To prune hydrangeas, identify your hydrangea type as pruning methods vary significantly. For panicle and smooth hydrangeas, prune in late winter or early spring by cutting back old or weak stems to encourage new growth. For bigleaf, mountain, and oakleaf hydrangeas, prune only dead stems in spring or remove spent blooms after they fade to avoid cutting off next year’s flowers, which form on old wood. Always use clean, sharp secateurs to make cuts above a bud or node, or cut down to the ground for a hard prune.
Identify your hydrangea type: This is the most critical step because different types have different pruning needs.
- Panicle (Hydrangea paniculata): Blooms on new wood.
- Smooth (Hydrangea arborescens): Blooms on new wood.
- Bigleaf (Hydrangea macrophylla): Blooms on old wood.
- Oakleaf (Hydrangea quercifolia): Blooms on old wood.
- Use clean, sharp tools: This helps to make clean cuts and prevent the spread of disease.
- Use the “scratch test” to identify dead wood: Lightly scratch the bark. If it’s green underneath, it’s alive; if it’s brown and brittle, it’s dead and should be removed.
Pruning by hydrangea type
Panicle and smooth hydrangeas (bloom on new wood)
When to prune:
- Late winter or early spring, just as new leaves begin to show.
How to prune:
- For size control: Cut stems back by one-third to one-half, or down to a few healthy buds.
- For renewal (smooth hydrangeas): You can cut all stems down to about 6 inches to 1 foot from the ground to encourage vigorous new growth.
- Remove: All dead, damaged, or weak and spindly branches. Cut back to a healthy, outward-facing bud.
Expert Guidance for Your Trees
If you have any questions or concerns regarding your trees, Johnson Ops Tree Care is available to help. Our team includes Certified Arborists who are ready to meet with you, walk through your yard, and determine the appropriate course of action tailored to your needs.
