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 We planted 2 Kashmir rose plants, about 5′ apart. The problem is they are drooping over in the bed. Do we support them in an up right position or leave them droop on the ground? I live in North Carolina and would like to transplant 3 endless summer hydrangeas. Is this time of year ok to transplant? If I add more soil acidifier to Endless Summer blue, will it make them darkest blue or purple? They are a medium blue now. I’d like purple! Love my endless summer, thank you. The endless summer hydrangeas do you take the canvas sack off around the root before planting or leave on?