Question WHEN IS THE BEST TIME TO PLANT CREEPING PHLOX? Answer Creeping phlox is a tough plant! You can plant it either spring or fall. If you plant it now, you will be able to enjoy it early spring when it flowers. Tags: CareDesignFAQProjects Related Questions Purchased First Editions Vanilla Strawberry hydrangea tree almost 2 weeks ago. Planted it on the ground, full sun (morning)area. Now, the bottom leaves are turning yellow. I make sure that soil doesn’t get dry. What to do? Can I leave them In the pot I bought them in? How do I trim to make them bloom more? I live in Maryland (Zone 6) its mid July and my blooms are fading, is this just the natural progression of life or will my plants re-bloom. They are getting the proper amount of water and I just lightly fertilized. Anything else I can do?