Fall is a great time to plant trees, shrubs and even some types of perennials, especially since garden centers usually have great deals on their outdoor plants. The usual problems with insect infestations on new plants are virtually nonexistent in the fall, and weather is more predictable. There is no need to fertilize your new plants, since fertilizer encourages new growth and the goal is for the plant to go dormant. And here’s another reason to plant in the fall: Lowe’s Home Improvement guarantees your outdoor plants will live for a year. So, save your receipt in case one or two plants don’t make it after a cold winter. The store will replace your dead plant free of charge.