How to Grow Rouge Royale
Helianthus annuus
Your complete guide to growing Rouge Royale.
📷 Wikipedia: Common sunflowerWhen to Plant Rouge Royale
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 Rouge Royale
✓ Good companions
Attracts hoverflies and parasitic wasps that control aphids and thrips
Repels ants, aphids, and rodents while attracting beneficial predatory insects
Deter aphids and Japanese beetles, may improve rose health and fragrance
Natural fungicide properties help prevent black spot and powdery mildew
Repels moths, fleas, and mosquitoes while attracting pollinators
Repel nematodes and aphids while attracting beneficial insects
Act as trap crops for aphids and cucumber beetles, protect roses from pests
Attracts beneficial insects and may help deter rose chafers
✗ Keep away from
Produces juglone toxin that inhibits rose growth and can cause yellowing and death
May stunt rose growth and compete heavily for soil nutrients
Compete for nutrients and water, create excessive shade that weakens rose growth
