How to Grow Johnny's Potomac Custom Mix
Antirrhinum majus
Your complete guide to growing Johnny's Potomac Custom Mix.
📷 Wikimedia CommonsWhen to Plant Johnny's Potomac Custom Mix
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 Johnny's Potomac Custom Mix
✓ Good companions
Repels aphids and whiteflies while attracting pollinators and beneficial insects
Repel aphids and other soft-bodied insects with their sulfur compounds
Attracts beneficial insects and provides habitat for pest predators
Attracts beneficial wasps and ladybugs that control aphids and other pests
Repels moths, fleas, and mosquitoes while attracting bees and butterflies
Repel nematodes, aphids, and whiteflies while attracting beneficial insects
Act as trap crops for aphids and cucumber beetles while attracting pollinators
Attracts beneficial insects like lacewings and hoverflies for natural pest control
✗ Keep away from
Produces juglone toxin that inhibits growth and can kill sensitive flowering plants
Releases allelopathic compounds that suppress growth of nearby plants
Can release allelopathic chemicals and compete aggressively for nutrients and water
