2. Lengthen Your Planting Schedule Install your garden in stages over a couple of seasons or even years. Focus first on your top ornamental priorities for foundation plants, perennials and shrubs and trees. Choose what you feel is necessary to add now and what can wait until later in the year or even a year or two down the road. In areas with warm-winter climates that get little to no summer rain, Ritchey recommends holding off planting trees until later in the year.