How to Grow Reien
Celosia argentea cristata
Your complete guide to growing Reien.
📷 Wikipedia: FlowerWhen to Plant Reien
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | May – June | July – September | — |
| Zone 2 | April – May | June – August | — |
| Zone 3 | April – May | June – August | — |
| Zone 4 | March – April | June – July | — |
| Zone 5 | March – April | May – July | — |
| Zone 6 | March – April | May – July | — |
| Zone 7 | February – March | April – June | — |
| Zone 8 | February – March | April – June | — |
| Zone 9 | January – February | March – May | — |
| Zone 10 | January | February – April | — |
| Zone 11 | January | January – March | — |
| Zone 12 | January | January – March | — |
| Zone 13 | January | January – March | — |
Companion Plants for Reien
✓ Good companions
Repels ants, mosquitoes, and rodents more effectively than chemical repellents
Repel aphids and Japanese beetles while improving soil with natural sulfur compounds
Attract beneficial predatory insects and provide habitat for pest controllers
Deters pests with strong scent and attracts pollinators like bees and butterflies
Repel aphids, whiteflies, and nematodes while attracting beneficial insects
Act as trap crops for aphids and cucumber beetles, protecting nearby flowers
Attracts beneficial insects like lacewings and hover flies that control pests
Improves soil health and attracts ladybugs and parasitic wasps
✗ Keep away from
Produces juglone toxin that inhibits growth and can kill sensitive flowering plants
Releases allelopathic compounds that suppress growth of nearby plants
Can inhibit growth of smaller flowers through allelopathy and resource competition
