Spring-flowering shrubs bloom on the growth of the previous season.
Prune them immediately after blooming.

1. Azalea – Prune May/June/July

2. Barberries – May/June/July

3. Continus – Smoke Tree

4. Forsythias – April thru July

5. Pieris – May/June/July

6. Rhododendrons Prune June/July

7. Spirea – Prune May/June

8. Syringa – Lilacs – Prune June/July

9. Viburnums – Prune May/June/July

10. Weigela – Prune May/June/July

Summer flowering shrubs should be pruned before spring growth begins.

1. Butterfly Bush – Prune when new growth starts emerging.

2. Clethra – Summersweet – Late fall or early spring.

3. Hibiscus – Rose of Sharon – Late fall or early spring.

4. Hydrangea arborescens – Responds well to being cut back to about 10"-12" above the ground. This gives you stronger stems and larger flowers.

5. Hydrangea macrophylla - the Big Leaf Hydrangea. The flower buds form in later summer and then flower the next year in early to mid-summer. The best time to prune is it after it blooms, from mid-July to mid-August.

6. Hydrangea paniculata – Peegee Hydrangea. Best pruned in early spring. Blooms on new wood. Very tolerant of hard pruning, in fact cutting the plant back from 1/2 to 1/3 will result in larger flowers. Can be pruned in winter but why not enjoy the winter beauty of snow on the dried flower heads.

7. Hydrangea quercifolia – Oakleaf Hydrangea. Prune June/July