Redbor kale can be distinguished from other kale varieties simply by its deep red and maroon color. The Redbor kale has frilly, curled leaves that have deep purple stems and veins running throughout. Some plants are entirely magenta, thought at times, others may have leaves that are tinged with green. Growing between 18 to 24 inches in length, the Redbor kale offers a mild cabbage-like flavor and crisp texture. When cooked it becomes tender and nutty with a mild earthy sweetness.