New perennial flowers to consider for 2021 In today's "Growing Together" column, Don Kinzler says perennials are all about patience — both because it can take three years to fully establish a flower, and because it can be difficult to find new types that are just getting to garden centers. Written By: Don Kinzler | × Shasta Daisy, Sweet Daisy Birdy. Photo courtesy of All-America Selections / Special to The Forum If you want to get a gardener’s attention, just mention the words “new variety.” It seldom matters whether it’s a new tomato, a shade tree or a flower; it’s hard to resist the allure of a shiny new plant type.