Seed Treatment
No pre-treatment or cold stratification required. Sow directly or start indoors for earlier blooms.
Optimum Germination Temperature
21–24°C (70–75°F). Warmth is key for quick and even germination.
Maximum Germination Time (Sub-optimal)
Up to 21 days. Under ideal conditions, expect germination in 3–7 days.
Light Requirements
Full sun (6–8+ hours daily). Needs plenty of sunlight to thrive and bloom richly.
How to Sow
Surface-sow seeds or press gently into the soil. Do not cover deeply—seeds need light to germinate. Thinly sow into moist, well-draining soil.
Planting Depth
Lightly press into the soil surface. Cover very lightly or not at all—seeds are tiny and need light.
When to Plant
Start indoors 6–8 weeks before the last frost or direct sow after danger of frost has passed and soil has warmed.
Watering
Keep soil consistently moist during germination. Once established, water moderately—Amaranthus tolerates some drought.
Post-Germination Care
Thin seedlings to 25–30 cm (10–12 in) apart once they have 2–3 sets of true leaves. Pinch back early growth to encourage bushier plants if desired.
Bloom Time
Mid to late summer. Long tassel-like blooms in deep crimson or magenta.
Soil Needs
Light, fertile, well-draining soil. Avoid heavy or waterlogged substrates. Tolerant of poor soil if drainage is adequate.
Fertilization
Optional—apply a balanced liquid fertilizer every 3–4 weeks for vigorous growth and more blooms.