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 WHAT FERTILIZER SHOULD I USE FOR MY VANILLA STRAWBERRY HYDRANGEA? One of my 3 My Endless Summer Original Blue hydrangeas completely lost all of its beautiful color. The blossoms look pale and sad. What’s going on? Watered daily and in part sun. How many months of the year in moderate temperature Northern CA do The Original and BloomStruck hydrangeas bloom? I live in zone 8a. Can my BloomStruck take 6 hours of direct sun and evening shade?