How to Grow Red Amaranth
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Red Amaranth
Amaranthus tricolor
vegetableRed amaranth is a fast-growing leafy green vegetable with vibrant red, pink, and green foliage that is popular in Asian, African, and Caribbean cuisines. The entire plant—leaves, stems, and seeds—is edible and highly nutritious. It thrives in warm weather and can be harvested continuously as a cut-and-come-again crop.
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Example Red Amaranth timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Amaranth
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Red Amaranth
Around May 17≈ 30 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9b-11; grown as warm-season annual in cooler zones
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Get my Red Amaranth timeline →Growth Stages
Seedling
10-14 daysTiny plants emerge with two cotyledons (seed leaves) and develop first true leaves showing red coloration
Keep soil moist; thin seedlings to proper spacing once they have 2-3 true leaves; provide bright light to prevent leggy growth
Vegetative Growth
14-25 daysRapid leaf expansion with distinctive red, pink, and green variegated foliage; stems become more robust and pigmented
Maintain consistent moisture and warmth (70-85°F optimal); feed with balanced fertilizer every 2-3 weeks; pinch growing tips if bushier plant desired
Leaf Production Peak
Ongoing, 2-4 weeks before floweringPlant reaches harvestable size with full, vibrant colored leaves ready for picking; may begin producing flower spikes
Begin harvesting outer leaves regularly to encourage continued production; deadhead flower spikes if leaf production is the goal; maintain moisture
Flowering
2-3 weeksDistinctive red or pink flower spikes develop at the top of the plant; leaves remain edible
Continue harvesting leaves; leave some flowers for seed production if desired; flowering signals plant maturity but doesn't stop leaf harvest
Seed Development & Harvest
3-4 weeksFlowers mature into seed heads; seeds develop and dry on the plant; leaves may become tougher but remain usable
Allow flowering spikes to mature fully if collecting seeds; harvest seed heads when dry and brown; thresh to extract seeds for next season
Common Pests
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Spray with water to dislodge; use insecticidal soap; encourage natural predators like ladybugs; avoid excessive nitrogen fertilizer
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Increase humidity through misting; spray with water; use neem oil or sulfur dust in severe cases; ensure adequate moisture
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Use row covers on young plants; spray with neem oil or pyrethrin; plant trap crops nearby; maintain plant vigor
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Improve air circulation; avoid wetting leaves when watering; remove affected leaves; apply copper fungicide if necessary
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Hand-pick; use Bacillus thuringiensis (Bt) spray; encourage natural predators; inspect regularly
Uses
Leafy Green Vegetable
CulinaryRed amaranth leaves are cooked as a nutritious spinach substitute in stir-fries, soups, curries, and traditional dishes throughout Asia, Africa, and the Caribbean. They can also be eaten raw in salads when young and tender. [source]
Grains and Seeds
CulinaryThe tiny seeds can be popped like popcorn, cooked into porridge, ground into flour, or used whole as a grain supplement. Seeds are rich in protein and amino acids. [source]
Nutritional Support
MedicinalRed amaranth is exceptionally high in vitamins A, C, and K, minerals like calcium, iron, and magnesium, and contains compounds with potential anti-inflammatory and antioxidant properties used in traditional medicine. [source]
Stem & Root Preparation
CulinaryThe tender stems can be eaten cooked like asparagus, and some varieties produce edible tubers that can be roasted or boiled as a root vegetable. [source]
Natural Dye
HouseholdThe vibrant red and pink pigments in leaves can be extracted and used to create natural plant-based dyes for textiles and crafts. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Begin harvesting leaves 30-40 days after planting when plants reach 4-6 inches tall. Use the cut-and-come-again method: pinch or cut outer leaves from the base, leaving the growing center intact to produce new leaves. Morning harvest yields the crispest leaves. Young, tender leaves are most flavorful; older leaves become slightly tougher but still edible. Entire plants can be cut at soil level for a full harvest, which promotes bushy regrowth. For seeds, allow plants to fully flower and dry; harvest seed heads before they shatter.
Fun Facts
- 🌱 Red amaranth has been cultivated for over 8,000 years and was a staple crop of the Aztecs, who considered it sacred; it remains an important food security crop in tropical regions worldwide.
- 🌱 The name 'amaranth' comes from the Greek words meaning 'unfading flower,' referring to how the bright red flower spikes retain their color even when dried.
- 🌱 Amaranth is a C4 photosynthesis plant, making it exceptionally efficient at converting sunlight and water into plant biomass, which is why it grows so rapidly even in hot, dry conditions.
Gardening Terms
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