How to Grow My Castle
Lupinus polyphyllus
Your complete guide to growing My Castle.
📷 Wikimedia CommonsWhen to Plant My Castle
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 My Castle
✓ Good companions
Repels ants, aphids, and rodents while attracting beneficial pollinators
Repel aphids and improve overall plant health
Attracts beneficial insects and provides structural support
Repels moths, fleas, and mosquitoes while attracting pollinators
Repel aphids, whiteflies, and nematodes while attracting beneficial insects
Act as trap crops for aphids and cucumber beetles
Attracts beneficial insects like lacewings and provides ground cover
Attracts beneficial insects and butterflies for pollination
✗ Keep away from
Produces juglone toxin that inhibits growth of many flowering plants
Allelopathic compounds suppress growth of nearby plants
Inhibits growth of most garden plants through allelopathic effects
