Tomato Companion Plants Checker: What Grows Well with Tomatoes
Pick any plant and instantly see whether it belongs next to your tomatoes, with the reason why. Good neighbors, bad neighbors, and the ones that do not matter either way.
Check a neighbor
Companion planting is guidance from grower experience and known plant biology (allelopathy, shared diseases, pest interactions), not exact science. The clear cases here are well established; treat the rest as sensible garden planning.
The quick version: basil, marigolds, alliums like onion and garlic, leafy greens, carrots, and flowering herbs are all good tomato neighbors. Keep tomatoes away from all brassicas (broccoli, cabbage, kale), corn, fennel, and above all potatoes, which share the same blights. The checker above covers nearly thirty common garden plants with the reasoning behind each verdict.
