The best time for pruning these trees is immediately after they flower. There is no harm to the plant if you prune them in late winter before flowering, but the flower show will be compromised since pruning will remove many of the flower buds.
FAQ #1136
Have a question? Try asking one of our Experts
When should I prune my Bradford pears and purple leaf plums?
Have a specific question? Try asking one of our Experts
Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.