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Pruning hydrangeas

Hydrangea arborescens 'Annabelle'
Photo: Sericea
 Hydrangea arborescens 'Annabelle'

Prune hydrangeas according to the species and at the right time

  • Species that bloom principally on new wood (H. arborescens) can be cut close to the ground (10-15 cm) yearly, in either the fall or early spring. However, even without any pruning, these shrubs will bloom annually.
  • Species that bloom on both old and new wood (H. macrophylla, H. paniculata, H. serrata, H. petiolaris, H. quercifolia) should be pruned more lightly. In the spring, a clean-up pruning is usually sufficient. Simply remove any frail, broken or dried stems. If necessary, you can cut the stems back by one-third or one-half.

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