Redbor kale is a variety of Brassica oleracea that is prized for its vibrant purple and magenta colored leaves.
It is among other colored kale varieties including Scarlet kale and Olympic Red, but unique in its almost complete red coloring from rib to leaf tip.
Redbor kale grows well in the spring and fall as a cool-weather crop, and when planted in winter, the temperature triggers Redbor's young green leaves to turn red.