What is companion planting?

Growing plants together for mutual benefit: pest control, pollination, space efficiency, nutrient sharing.

Three Sisters: corn, beans, squash. Beans fix nitrogen, corn provides support, squash shades soil.

Companion Planting Checker Calculator

Discover beneficial and detrimental plant pairings to optimize your garden\

Discover beneficial and detrimental plant pairings to optimize your garden's health.

Select Your Main Plant

The full supporting guide for this calculator is still being expanded. The tool remains accessible while we improve the educational content.

Continue with calculators that answer nearby questions and help compare the next step.

Calculate how many plants can fit in your garden bed using either traditional row spacing or the square-foot gardening method.

Plan your square foot garden layout, determining how many plants fit per square foot for various crops.