This gourmet mix gives gardeners a selection of kales from Russian to Italian, purple to green - all delicious and good for you. Space 18" apart in the garden or plant in containers. All varieties of kale love the cooler weather and improve in flavor after a light freeze. Cut off the outer leaves to harvest as needed and leave the rest to keep on growing. Kale is a biennial, growing leaves and roots the first year of growth, then flowering the second year before dying. Kale rapini, often sold in the late winter/early spring farmers' markets, is the entire second year plant, flowers, stems, and leaves, and is usually quite sweet.