Our perennial selections are based on providing color through the changing seasons. Most perennials have a "bloom time", either spring, summer, or fall so it's important to select varieties that have differing bloom times. Perennials also have different heights and spreading habits, so be sure to select the right perennial for the garden space you are developing. Our Perennials Availability List Page is further defined by perennials that: Attract Pollenators, are Deer-resistant, are best For Shade, serve as Groundcovers, or are Xeric/Water-wise. And again, we encourage gardeners to consider providing a diverse plant community of shrubs, perennials, and all-season annuals that provide a range of food and shelter for beneficial insects and birds to keep pests in check.