Walking Stick kale is the stuff of legend. We remember reading about this fascinating plant in the seed catalogs of yesteryear. Also known as Tall Jacks, Jersey Cabbage or Cow Cabbage, this extra-tall kale is said to grow up to 20 feet in its native range, with an average of 6-12 feet in our gardens. Grown in Europe for centuries, mostly on the island of Jersey, the largest of the Channel Islands, where its long sturdy stalks were varnished and turned into canes. The leaves are also considered..