Snap Pea Companion Planting
Pisum sativum var. macrocarpon
Legume (Fabaceae) -- cool season
Good Companions for Snap Pea
Pea nitrogen fixation benefits turnip growth. Both are cool-season crops. Pea vines provide light shade that moderates soil temperature for turnip root development.
Sow together in early spring. Harvest turnip greens while peas establish, then harvest turnip roots.
- Intercropping legumes and vegetables for nutrient management -- HortTechnology (2009)
Pea roots fix nitrogen that benefits subsequent carrot growth. Both are cool-season crops with compatible growing conditions. Pea vines provide light shade that benefits carrot seedling establishment.
Sow together in early spring. Carrots continue growing after peas are harvested.
- Intercropping legumes and vegetables for nutrient management -- HortTechnology (2009)
- Soil fertility benefits of legume cover crops and intercrops -- USDA SARE Technical Bulletin (2012)
Crops to Avoid Near Snap Pea
Garlic organosulfur compounds inhibit Rhizobium bacteria that form nitrogen-fixing nodules on pea roots, reducing the primary agronomic benefit of pea cultivation.
Applies to all pea types (snap, shelling, snow) and all alliums.
- Allelopathic effects of Allium species on legume Rhizobium symbiosis -- Plant and Soil (1996)