This guide summarizes the 59 PlantNeighbors pair pages that include Tomato. It only marks a pair good or bad when the compiled extension-source facts support that verdict; the rest are treated as ordinary spacing and rotation decisions.
15 documented companions
16 documented incompatibles
28 neutral or undocumented pairs
Documented companions for Tomato
Asparagus, Basil, Carrot, Celery, Chives, Cucumber, Garlic, Leek, Lettuce, Marigold, Nasturtium, Onion, Parsley, Shallot, Spinach.
Pairs to keep apart
Arugula, bok choy, Broccoli, Brussels Sprouts, Cabbage, Cauliflower, Collards, Corn, Fennel, Kale, Kohlrabi, Mustard Greens, Potato, Radish, Rutabaga, Turnip.
How to use this guide
Start with the sourced pair pages, then adapt the layout to your bed size. Companion planting cannot replace crop rotation, sufficient spacing, water, healthy soil, or scouting for pests.