How to Plant Amaranthus Flower Seeds
Fast Facts
- Planting season
- Spring
- Life cycle
- Annual
- Sowing method
- Direct Sow, Start Indoors
- Seed prep
- Requires Light
- Light
- Full Sun, Partial Shade
- Water needs
- Average
- Planting depth
- 1/16 inch
- Spacing
- Varies by variety
- Mature height
- Varies by variety
- Hardiness zones
- 3 to 10
- Bloom season
- Summer through Fall
- Days to maturity
- 60 to 90 days
Ranges cover every variety in this group. Check the product page for the exact figures.
About Amaranthus Flower Seeds
Amaranthus Flower Seeds grow in full sun, partial shade positions. Flowering runs summer through fall. Harvest begins around 60 to 90 days from sowing. The figures below are the ones on the packets in this group; each product page carries the exact numbers for that variety.
When to plant
Plant in spring. Seed can be started indoors ahead of the season or sown straight into prepared ground once it has warmed. Hardy in zones 3 to 10 — your local frost dates decide the exact week.
Where to plant
Choose a site in full sun, partial shade. Water needs are average once the plants are established. Free-draining soil matters more than rich soil; seed sown into ground that stays wet rots before it germinates.
How to plant
Sow 1/16 inch deep. This seed needs light to germinate, so press it onto the surface and firm it in rather than burying it. Water gently to settle the soil, then keep the surface evenly moist until seedlings or shoots appear. Indoor starts do best in warmth and bright light; harden the seedlings off over a week before planting out.
How to care
Keep watering average, at the base of the plant rather than over the leaves. Grown as an annual, so plan to sow again next season. Flowers appear summer through fall; cutting or deadheading regularly keeps more coming. Expect to start harvesting around 60 to 90 days after sowing.







