How to Grow Iron Yellow
Matthiola incana
Your complete guide to growing Iron Yellow.
📷 Wikipedia: FlowerWhen to Plant Iron Yellow
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 Iron Yellow
✓ Good companions
Similar sun and water requirements, attracts pollinators and beneficial insects
Attracts beneficial insects and provides complementary height and texture
Repels pests like moths and flies while attracting beneficial pollinators
Natural pest deterrent, repels nematodes and aphids while attracting beneficial insects
Acts as trap crop for aphids and cucumber beetles, attracts predatory insects
Provides beneficial shade and attracts pest-eating birds and beneficial insects
Attracts beneficial insects like lacewings and hoverflies that control pests
Attracts butterflies and beneficial pollinators, similar growing requirements
✗ Keep away from
Produces juglone which is toxic to many flowering plants and inhibits growth
Blocks essential sunlight needed for proper flowering and growth
Allelopathic properties suppress growth of nearby plants
