Companion Planting Checker
Discover which plants grow well together and which combinations to avoid. Select your plants to see compatibility recommendations and warnings.
Select Your Plants
Selected Plants
Compatibility Results
Select plants to see compatibility analysis
Good Companions
Avoid These Combinations
How to Use This Companion Planting Checker
1. Select Your Plants
Choose the vegetables, herbs, or flowers you want to grow together. Use the search box to quickly find specific plants, or browse the alphabetical list.
2. Review Compatibility
See which of your selected plants work well together (good companions) and which combinations to avoid (warnings). Each relationship includes an explanation of why plants help or hinder each other.
3. Discover New Additions
Explore suggested plants that would complement your selection, or review plants to avoid adding to your garden layout.
Benefits of Companion Planting
Natural Pest Control
Certain plants repel insects that damage their neighbors. For example, onions deter carrot fly, while marigolds repel nematodes and whiteflies.
Improved Soil Health
Legumes like beans and peas fix nitrogen in the soil, providing natural fertilizer for heavy-feeding plants like brassicas and corn.
Space Optimization
Combine plants with different growth habits and root depths to maximize your garden space and extend your growing season.
Popular Companion Planting Combinations
Three Sisters (Corn, Beans, Squash)
Traditional Native American planting where corn provides support for beans, beans fix nitrogen, and squash provides ground cover.
Tomatoes & Basil
Classic pairing where basil repels whiteflies and may improve tomato flavor while both plants thrive in similar conditions.
Carrots & Onions
Onions mask the scent that attracts carrot fly, while carrots help break up soil for onion bulbs.
Lettuce & Radishes
Fast-growing radishes mature before lettuce needs the space, and may help deter pests from delicate lettuce leaves.
Plan Your Complete Garden with Leaftide
Ready to put companion planting into practice? Leaftide helps you design garden layouts, track planting schedules, and manage your entire growing season with built-in companion planting guidance.
Start Planning Your Garden →Note: Companion planting effects can vary based on soil conditions, climate, and plant varieties. Always consider your local growing conditions and space requirements.