How to Plant and Grow Amaranthus
Plant Amaranthus Seeds: Direct sow amaranthus seeds into prepared seed beds after all danger of frost (and the soil has fully warmed) in groups of 4 seeds spaced 18-24 in. apart. Thin to the strongest plant. Or, scatter seed over ground that has had the top 1 in. of soil loosened. Rake seed in lightly, walk over area to firm soil. Keep moist until germination. Amaranthus seed is easy to germinate provided the soil is warm. Seed can also be started indoors in cell packs or 2 in. containers. Kept at 65-75°F., germination is in 10-21 days.
Grow Amaranthus: Full or part sun. Plants tolerate high heat, and any soil as long as drainage is good. Amaranthus will grow faster, produce more flowers with regular water; will tolerate some drought once established. Seed heads attract birds.