How to Grow Celosia
Celosia argentea plumosa
Celosia argentea plumosa is a vibrant warm-season annual prized for its striking feathery blooms and edible microgreen potential. Gardeners cultivate it to add bold color to summer borders or harvest nutritious, tender shoots within two weeks of sowing.
📷 Wikimedia CommonsStarting Celosia: indoors or direct sow?
🌾 Sow directly in the garden — Celosia is not usually started indoors.
This plant is sown directly outdoors after the last frost date; do not start indoors or transplant seedlings.
Soil, care & harvest
Prepare loose, well-draining soil with a pH between 6.0 and 7.5 for optimal growth. Since this is a warm-season crop, sow seeds directly outdoors only after all danger of frost has passed and soil temperatures are consistently warm. Broadcast the seeds densely on the surface as they do not require spacing or deep burial; simply cover lightly with a thin layer of soil.
Keep the growing medium consistently moist but avoid waterlogging to prevent fungal issues, watering from below when possible. No trellising is required for these low-growing plants that reach only 9 to 18 inches tall. Apply a light mulch around established plants to retain moisture and suppress weeds, though excessive humidity can encourage mold on the soil surface.
While pests are rarely an issue at home scale, watch for damping-off or surface mold caused by overwatering or poor air circulation; ensure good drainage and airflow. Harvest your microgreens in just 10 to 15 days when seedlings are young and tender. Snip the shoots cleanly above the soil line using scissors or a sharp knife.
When to Plant Celosia
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | January – December | — | January – December |
| Zone 2 | January – December | — | January – December |
| Zone 3 | January – December | — | January – December |
| Zone 4 | January – December | — | January – December |
| Zone 5 | January – December | — | January – December |
| Zone 6 | January – December | — | January – December |
| Zone 7 | January – December | — | January – December |
| Zone 8 | January – December | — | January – December |
| Zone 9 | January – December | — | January – December |
| Zone 10 | January – December | — | January – December |
| Zone 11 | January – December | — | January – December |
| Zone 12 | January – December | — | January – December |
| Zone 13 | January – December | — | January – December |
Companion Plants for Celosia
✓ Good companions
Repels aphids and thrips while attracting beneficial insects
Repels aphids and other soft-bodied insects
Attracts beneficial insects and has similar water needs
Similar growing conditions and harvest timing for microgreens
Deters nematodes and aphids with strong scent compounds
Acts as trap crop for aphids and flea beetles
Quick growth cycle complements microgreen harvesting
Compatible growth habits and nutrient requirements
✗ Keep away from
Produces allelopathic compounds that inhibit seed germination
Releases allelopathic chemicals that stunt growth of nearby plants
Juglone production severely inhibits growth and development
Nutrition Facts
Per 100g serving (USDA FoodData Central)
