Pruning shrubs in August or early September may encourage a late flush of.

Sep 25, Shrubs that Bloom on this Year's Growth Shrubs that bloom on current season’s growth, or that do not produce ornamental flowers, are best pruned in late winter to early spring. Examples of these include: Rose of Sharon, Japanese spirea, butterfly bush, blue mist spirea and; burning bush euonymus.

Pruning during the spring allows wounds to heal quickly without threat from insects and. Apr 20, DO Prune Flowering Shrubs at the Right Time of Year Spring-flowering shrubs, such as lilac and forsythia, develop buds that will display the following year Estimated Reading Time: 5 mins.

Spring, or spring through summer. Cut back old stems in winter or early spring. Deadhead spent flower stems. Silver Dalea Black Dalea Trailing Dalea Yellow Bush Dalea Bush Dalea Dalea bicolor D. frutescens D. greggii D. lutea D. pulchra Fall blooming Late summer and fall Late fall Prune vigorous species by renewal pruning of one third toFile Size: 27KB.