Sow indoors 4-6 weeks before your last frost.
Transplant out after last frost.
May be direct seeded after last frost.
Note: Slow growing until warmer weather. Blink and they are big!
12-15" between plants in rows 18" apart.
7-10 days @ soil temp 70-80F
Low to average. Well-drained soil is preferred although they are rather forgiving.
Remember, amaranth loves warm weather and will grow very slowly until it warms up. You may use row cover to keep them warm after transplanting.
Edible seeds and young leaves for you and other critters. To harvest seeds, wait until flowers are firm and dry to the touch. Seed will rub out easily in your hands and plumes/stalks may be cut and tarped or hung to dry further. Protect from the birds if you're not into sharing!
It is truly best Not to let amaranth go to seed in the field/garden unless you're really into the spring greens!