Tyfon, or Holland greens is a hybrid between Chinese Cabbage (Brassica rapa Pekeninensis Group) and stubble turnip (Brassica rapa Rapifera Group). Tyfon is rapid growing and vigorous...extremely cold-hardy and also slow to bolt. Several foliage harvests can be made by repeated cuttings. Mild in flavor, Tyfon can be eaten fresh as a salad green, or as a cooked pot-herb, just as collard or mustard greens.