How to Grow Sweet Pea Royal Mix
Lathyrus odoratus 'Royal Mix'
Your complete guide to growing Sweet Pea Royal Mix.
📷 Wikipedia: Sweet peaWhen to Plant Sweet Pea Royal 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 Sweet Pea Royal Mix
✓ Good companions
Attracts beneficial insects like hoverflies and parasitic wasps that control sweet pea pests
Fix nitrogen in soil which sweet peas can utilize, both being legumes with similar growing habits
Attract beneficial insects and may help deter aphids and other soft-bodied pests
Attract beneficial insects and provide complementary blue colors to sweet pea blooms
Attract beneficial insects and provide structural diversity without competing for resources
Repels moths and other flying insects while attracting pollinators
Repel aphids, whiteflies, and other pests that commonly attack sweet peas
Act as trap crops for aphids and cucumber beetles, drawing pests away from sweet peas
✗ Keep away from
Releases juglone toxin which inhibits growth and can kill sweet peas
Releases allelopathic compounds that inhibit germination and growth of sweet peas
Compete heavily for nutrients and water, and may release allelopathic compounds
