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 Hi purchased beginning of may and the shrub has a couple of full grown roses. We had a late spring frost and ever since the roses that do bloom currently are small and petals just fal right off. Is this normal? How far apart should I plant my Endless Summer hydrangeas? Where is the video on the garden gab page on how and when to fertilize my Endless Summer hydrangea? When and what is the best way to remove Hydrangea blooms once they are turning brown, or cycled through their color?