How to Grow Sonja
Helianthus annuus
Your complete guide to growing Sonja.
📷 Wikipedia: Common sunflowerWhen to Plant Sonja
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 Sonja
✓ Good companions
Deter aphids and improve soil with their sulfur compounds
Attract beneficial insects and provide structural support
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
Attracts beneficial wasps and provides ground cover
Attracts beneficial predatory insects like lacewings and hover flies
Attract beneficial predatory insects and provide complementary colors
✗ Keep away from
Releases juglone which is toxic to many flowering plants
Produces allelopathic compounds that inhibit nearby plant growth
Releases chemicals that stunt growth of most companion plants
