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 Can I leave them In the pot I bought them in? I live in Texas where the summer months hit 100+ degrees every day. I would like to set up an automatic drip system for my hydrangeas. How long and what time of day should I set the timer for? HOW DO I KNOW IF MY EASY ELEGANCE ROSES DIED OVER WINTER? DOES FIRST EDITIONS HAVE EVERGREEN CRAPE MYRTLES?