Parsnip (Pastinaca sativa)

Parsnips benefit from companion planting by growing alongside plants that enhance their growth, deter pests, and improve soil health. Good companions include onions and garlic, which repel carrot flies and aphids, while peas and beans help enrich the soil with nitrogen. Radishes loosen the soil for parsnip roots, and leafy greens like lettuce maximize space without competing for nutrients. Marigolds attract beneficial insects and protect against nematodes.

However, some plants should be avoided near parsnips. Carrots share common pests like carrot flies, increasing infestation risks. Celery and dill compete for nutrients, potentially stunting parsnip growth, while fennel releases chemicals that inhibit development. By carefully selecting companion plants, parsnips can grow healthier, with fewer pest issues and improved yields.