How to Grow Sunbright
Helianthus annuus
Your complete guide to growing Sunbright.
📷 Wikipedia: Common sunflowerWhen to Plant Sunbright
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 Sunbright
✓ Good companions
Attracts beneficial insects and may improve soil nutrients
Provide habitat for beneficial insects and attract pollinators
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
Repel aphids, tomato hornworms, and other garden pests
Attracts hoverflies and parasitic wasps that control aphids
Attract pollinators and beneficial predatory insects
✗ Keep away from
Produces juglone toxin that inhibits growth of many flowering plants
Releases allelopathic compounds that suppress nearby plant growth
Inhibits growth of most garden plants through allelopathy
