Planting for Summer Color By Dr. Jerry Parsons Plant: For color get the begonias and impatiens in quickly if you expect them to fare well when the heat arrives. Wait to mid-month to plant periwinkles. ·Don’t plant vinca until at least June 1. Hot weather plants include firebush, lantana, poinciana, esperanza, firespike, caladium, coleus, begonia, …