How to Grow Black Button
Centaurea cyanus
Your complete guide to growing Black Button.
📷 Wikimedia CommonsWhen to Plant Black Button
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 Black Button
✓ Good companions
Deters ants, aphids, and rodents while attracting beneficial pollinators
Attracts pollinators and beneficial predatory insects while providing visual contrast
Repels moths, fleas, and mosquitoes with its strong fragrance
Repel aphids, whiteflies, and nematodes while attracting beneficial insects
Act as trap crops for aphids and cucumber beetles, protecting nearby plants
Attracts beneficial insects and provides ground cover without competing for resources
Attracts beneficial insects like lacewings and hover flies for pest control
Attracts butterflies and beneficial insects while complementing growth habits
✗ Keep away from
Produces juglone toxin that inhibits growth and can kill sensitive flowering plants
Releases allelopathic compounds that suppress growth of nearby plants
Compete aggressively for nutrients and water, may stunt growth of smaller flowers
