| Species |
Light level |
Hardiness |
Maintenance or rejuvenation pruning |
|---|
| H. arborescens |
Sun or partial shade |
Zone 3 |
- Annual cutback: cut the stems close to the ground (10-15 cm) in the spring or fall
|
| H. paniculata |
Sun or partial shade |
Zone 3 or 4 (depending on the cultivar)
|
- Not needed often, as required.
- Shrub branches: cut stem length by one-third or one-half.
- For a shrub branching from the base: rejuvenate gradually by removing one-third of the old branches (5 years) or rejuvenate by cutting all the branches back to the ground (10-15 cm) in the spring or fall.
|
| H. macrophylla |
Partial shade |
Zone 5 (roots) Zone 6 (stems and flower buds) |
- For cultivars that flower on the new annual wood: cut to the ground (8-10 cm) each fall.
- Cultivars that bloom partially on old and partially on new wood: in autumn, cut the stems by one-third or one-half above a vigorous bud. In the spring, remove the dead wood and frail or elderly stems.
|
| H. serrata |
Partial shade |
Zone 5 |
- Prune lightly: cut the stems by one-third or one-half. Spring cleaning.
|
| H. petiolaris |
Partial shade |
Zone 5 |
- Prune lightly: cut the stems by one-third or one-half. Spring cleaning.
|
| H. quercifolia |
Sun or partial shade |
Zone 5 (roots) Zone 6 (stems and flower buds) |
- Prune lightly: cut the stems by one-third or one-half. Spring cleaning.
|
