Sow in pots indoors in April for planting out in May, or direct sow after danger of frost. Space or thin to 6-12 in. Harvest leaves as needed for salads or cooking greens.
Harvest for grain when seeds rub off easily in your hand, but before seedhead is crispy dry. Hang over a tarp to dry for several days, then dance, rub, or flail seeds from seedheads. Winnow to clean or place seeds in a bowl and make stirring motion with your arm; chaff rises to the top for easy removal. Isolate from other amaranths by 1/4 mile.