Transplanting is the art of moving a plant (usually seedling or perennial) from one location (or medium) to another. Seedlings are usually started indoors where the conditions (temperature and humidity) are just right, but will be transplanted to a permanent location when they are matured enough. There are some perennial plants that will die in frost, so they are taken indoors during winter. Remember to acclimatize your seedlings before transplanting them.