Can I plant garlic next to tomato?

Yes. Garlic's sulfur compounds may deter spider mites on tomatoes.

Can I plant garlic next to bush beans?

Better not to. Alliums are traditionally kept off legume beds on the theory that they inhibit nitrogen-fixing bacteria, but WSU Extension's review of companion-planting research found no scientific basis for that specific mechanism — treat this as garden tradition, not measured evidence.

Companion Planting: Garlic

Allium sativum

Spacing: 4 per square foot. Mature height: 1-2 ft.

Plant these nearby

Tomato: Garlic's sulfur compounds may deter spider mites on tomatoes.

Keep these apart

Bush Beans: Alliums are traditionally kept off legume beds on the theory that they inhibit nitrogen-fixing bacteria, but WSU Extension's review of companion-planting research found no scientific basis for that specific mechanism — treat this as garden tradition, not measured evidence. (source)

Common pairings, answered directly

Can I plant garlic next to tomato?: Yes. Garlic's sulfur compounds may deter spider mites on tomatoes.
Can I plant garlic next to bush beans?: Better not to. Alliums are traditionally kept off legume beds on the theory that they inhibit nitrogen-fixing bacteria, but WSU Extension's review of companion-planting research found no scientific basis for that specific mechanism — treat this as garden tradition, not measured evidence.

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Companion planting for Garlic: which plants to grow next to it, which to keep apart, and the reason behind each pairing.

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