Status: We still have plenty of seeds in stock. 2019 preorders are now open. This status will probably not be updated again until after harvest around December, 2018.
The perennial Crambe species like sea kale and Tartar bread plant are versatile and hardy plants, similar to cabbage. All parts are edible. Once you have plants started from seed, you can propagate them from root cuttings, which are usually called thongs in this genus.