Planting Trees and Shrubs -- Plant container-grown trees, shrubs, perennial herbs, ground covers, and perennial flowers.
Planting Nursery Plants -- Plant warm-season annual flowers and vegetables (tomatoes, peppers, marigolds, petunias and the like) after all danger of frost has passed but in enough time for them to beat the summer heat. In hot desert areas, for example, that means no later than mid-February. If in doubt, give a quick call to the garden center nearest you. Microclimates and growing conditions can vary radically within just a few miles of each other and in places like Southern California, within just a few blocks of each other.
Fertilizers -- Fertilize roses and fertilize perennials at the end of the month and keep them watered. You can use chemical fertilizers (follow package directions on amount and frequency) or organic fertilizers, such as compost, fish emulsion, and others.
What To Plant -- Plant bare-root artichokes, rhubarb, and strawberries now.