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Companion planting in the vegetable garden

Companion Planting for Edible Crops

Crop   Compatible companions   Incompatible
Asparagus   tomato, parsley, basil    
Beans   most vegetables and herbs   onion, garlic, gladiolus
Beans, bush   Irish potato, cucumber, corn, strawberry, celery, summer savory   onion family
Beans, pole   corn, summer savory, radish   onion, beets, kohlrabi, sunflower
Beets   cabbage and onion families, lettuce   pole beans
Cabbage family   aromatic herbs, celery, beets, onion family, chamomile, spinach, chard   dill, strawberry, pole beans, tomato
Carrots   English peas, lettuce, rosemary, onion family, sage, tomato   dill
Celery   onion and cabbage families, tomato, bush beans, nasturtium    
Corn   Irish potato, beans, English peas, pumpkin, cucumber, squash   tomato
Cucumber   beans, corn, English peas, sunflowers, radish   Irish potato, aromatic herbs
Eggplant   beans, marigold    
Lettuce   carrot, radish, strawberry, cucumber    
Onion family   beets, carrot, lettuce, cabbage family, summer savory   beans, English peas
Parsley   tomato, asparagus    
Peas, English   carrots, radish, turnips, cucumber, corn, beans   onion family, gladiolus, Irish potato
Potato, Irish   beans, corn, cabbage family, marigolds, horseradish   pumpkin, squash, tomato, cucumber, sunflower
Pumpkins   corn, marigold   Irish potato
Radish   English peas, nasturtium, lettuce, cucumber   hyssop
Spinach   strawberry, fava beans    
Squash   nasturtium, corn, marigold   Irish potato 
Tomato   basil, onion family, nasturtium, marigold, asparagus, carrot, parsley, cucumber   corn, Irish potato, fennel, cabbage family
Turnip   English peas   Irish potato

Source: Edible Landscaping Handbook, Companion Planting Chart for Home & Market Gardening, pg 15, prepared for the UCCE Master Gardener Program by the California Center for Urban Horticulture, UC/Davis. Original Source: ATTRA (Appropriate Technology Transfer for Rural Areas) Companion Planting: Basic Concepts & Resources.