Wait until fall frost kills tall phlox before pruning to the ground; fall pruning is keeps powdery mildew at bay. Regular deadheading and light trimming encourage bushier growth, extend blooming, and ...

Q: I have planted quite a few phlox plants in my border this year, and they are flowering beautifully. When the blooms fade, is it a good idea to deadhead them? And if so, what's the best approach to ...