Answer: Catharanthus is an annual plant. It will spread, but not in an invasive way. It looks great in a hanging basket or allowed to drape over the edges of a planter box or even allowed to hang over a wall. It looks just as good allowed to grow uninhibited along the ground. It will not root along the stems as periwinkle (vinca minor) might. At the end of the season it will die back and you can pull the entire plant out without leaving roots or any other debris. Hope this clarifies things for you!
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