Most kale is grown as annual plants, however, you can get perennial varieties of kale. These include Taunton Deane Kale or Daubenton’s Kale, which are perennial plants that are hardy to US hardiness zones 6-9 and will give you harvests of nutritious leaves year after year. These plants do not go to flower or produce seeds, and tend to grow higher and wider than usual kale plants.