The genus Amaranthus has about 70 species of annual or short-lived perennial plants, including several species of invasive edible weeds that are native to the US, like Amaranthus retroflexus (redroot pigweed). Amaranths are branching, broad-leaved plants with rhombic or egg-shaped leaves that might be smooth or have very small hairs on them. The leaves have long petioles, are green or red in color, and have noticeable veins. The plants produce solitary, usually red to purple, flowers on terminal spikes. Amaranths are typically planted as annuals and are harvested after one growing season, reaching a height of up to 2.5 m (6.6 ft).
Care
Light
In the northern portion of its habitat, amaranth grows best in full sun, but in warm southern regions, it can benefit from some afternoon shade. Amaranth should typically be planted in an area with at least six hours of direct sunlight every day.
Soil
Amaranth thrives in medium soils and can even thrive in subpar soils. The only soils that are likely to be wholly unfavorable for amaranth are likely to be dense clay combinations, while extremely rich soils may prevent flowering and seed formation.
Water
Water requirements for amaranth plants are typical, at most one inch per week. Be careful not to overwater them or you run the danger of fungal illnesses or root rot.
Temperature and Humidity
In contrast to other lush green crops, amaranth does well in the heat. As many species are indigenous to the southern United States and Mexico, even in the presence of exceptionally warm temperatures, you can expect them to flourish.
Fertilizer
Amaranth does not need any extra nutrition. Excess nitrogen, which is frequently found in fertilizers, can make plants lanky and less appropriate for harvest.
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