Pruning evergreen bushes is best done in late March or early April before new growth begins. Light pruning can also happen in late June or early July. Avoid pruning evergreen shrubs in the fall, since they are more susceptible to winter injury.

Evergreens are best pruned in spring, but many can be trimmed in late summer to early fall. Just do not trim too late into fall, as this will encourage the bush to put on a flush of new growth that will be susceptible to winter damage and this can reduce the overall cold hardiness of the bush.