What is the Three Sisters planting method?

Corn, beans, and squash grown together. Corn provides a trellis for beans, beans fix nitrogen for the other two, and squash leaves shade the ground to suppress weeds and retain moisture. It’s one of the oldest documented companion planting systems.

Why are onions and beans listed as antagonists?

Alliums (onions, garlic, leeks) release compounds that inhibit the growth of legumes and can suppress the nitrogen-fixing bacteria in bean root nodules. Keep them in separate beds.

Companion Planting Guide

About Companion Planting Guide

An interactive reference for companion planting with 12 common garden plants. Select a plant to see its beneficial companions, antagonists to avoid, growing conditions (sunlight, season, difficulty), and specific benefits like pest deterrence or soil improvement. Switch between a card grid and a compatibility matrix chart.

Database of 12 plants: tomato, basil, carrots, onions, lettuce, marigold, beans, corn, squash, radish, cabbage, and pepper
Each plant lists companions, antagonists, growing season, sunlight needs, difficulty, and specific benefits
Compatibility matrix view shows companion/antagonist/neutral relationships in a cross-reference table
Filter plants by category (vegetable, herb, flower, fruit) and growing season
Quick tips section covers Three Sisters planting, herb companions, pest control, and soil health

Frequently Asked Questions

What is the Three Sisters planting method?: Corn, beans, and squash grown together. Corn provides a trellis for beans, beans fix nitrogen for the other two, and squash leaves shade the ground to suppress weeds and retain moisture. It’s one of the oldest documented companion planting systems.
Why are onions and beans listed as antagonists?: Alliums (onions, garlic, leeks) release compounds that inhibit the growth of legumes and can suppress the nitrogen-fixing bacteria in bean root nodules. Keep them in separate beds.

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