In Italy, 'Nero Di Toscano' Kale is a real eye-catcher in the vegetable or flower garden with its crinkled, strap-shaped leaves of dark green. Baby greens can be harvested for salads at 30 days, but for a real treat wait until after frost, when the flavor becomes quite sweet and more complex (Kale is a good source of Vitamins A and C, too). Fully mature 50 days from transplant. The harvest continues even after snowfall as the plants are very cold-tolerant. Also known as Black Palm, for its dark leaves and resemblance to that plant as the stems become taller.