How to Grow Corn Poppy
Papaver rhoeas
Your complete guide to growing Corn Poppy.
📷 Wikimedia CommonsWhen to Plant Corn Poppy
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 Corn Poppy
✓ Good companions
Compatible cereal grain that creates beneficial microclimate and doesn't interfere with poppy growth
Attracts beneficial insects and helps repel aphids and other common garden pests
Attracts beneficial insects and may improve soil health through root secretions
Fixes nitrogen in soil and provides ground cover without interfering with poppy development
Similar growing requirements and attracts pollinators while creating attractive wildflower combinati…
Compatible fiber crop with similar soil preferences that doesn't compete aggressively
Excellent pollinator plant that attracts bees and other beneficial insects to support poppy pollinat…
Traditional companion crop that provides support and shelter without competing heavily for nutrients
✗ Keep away from
Produces juglone which is toxic to poppies and inhibits their growth and germination
Allelopathic properties inhibit growth of most garden plants including poppies
Strong allelopathic effects and aggressive root system that competes heavily for nutrients and water
