Perennials are plants that will grow from seed each year and be perennial. SunPatiens are perennials. You should deadhead your SunPatiens at least once a year to keep them healthy. Some sunpatiens do not need deadheading because their stems develop little spikes of light-colored, fluffy, pollen producing stigmas – the male structures that attract female flowers and fertilize them with pollen which in turn form seeds that eventually take root and grow new plants. These seeds are self-sown or “set” during the summer when there is not enough cold or rain to stop their development (when their “set” point occurs).