Key Points Cut back creeping phlox right after it finishes blooming in spring if pruning at all. 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 keep plants tidy. If your phlox plants look bedraggled or you’ve been …
Read More »Don’t Risk Next Year’s Blooms — When and How to Cut Back Phlox the Right Way
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