An indoor companion planting guide helps you group houseplants that have similar care requirements. Placing compatible plants together creates shared microclimates, simplifies watering schedules, and prevents one plant's needs from conflicting with its neighbors. Select 2–6 plants below to see their compatibility scores.
Select Plants to Compare
Overall Group Compatibility
Compatibility Matrix
Green = great match, Yellow = some adjustments, Red = consider separating
Compatibility Factor Breakdown
How to Use the Indoor Companion Planting Guide
The indoor companion planting guide scores houseplant groupings on four key compatibility factors, giving you an evidence-based recommendation instead of guesswork. Whether you are designing a plant shelf, filling a terrarium, or grouping pots on a windowsill, this tool shows which combinations will thrive together.
Step 1: Add Your Plants
Search for plant names in the search box or use the dropdown to add up to 6 plants to your selection. Remove any plant by clicking the X on its chip. You need at least 2 plants to generate compatibility scores.
Step 2: Check the Matrix
The compatibility matrix shows every pair's score: green cells (70%+) indicate plants that share very similar needs; yellow cells (40-70%) mean minor adjustments may be needed; red cells (under 40%) suggest the plants have conflicting requirements and may not thrive when grouped. Each cell shows the score percentage.
Step 3: Review Factor Breakdowns
The factor breakdown shows which specific dimension causes any incompatibility. Light is the most important factor (40% weight) — a cactus and a fern will always score low here because their light needs are opposite. If humidity is the main incompatibility, you might still group the plants but add a humidifier or pebble tray to meet the more demanding plant's needs.
Step 4: Build Your Perfect Grouping
For terrariums, focus on 90%+ compatibility across all factors — the confined space means each plant's microenvironment directly affects the others. For open shelving, 60%+ compatibility is usually sufficient since you can adjust individual plants slightly. Use the watering schedule calculator to confirm all plants in your group can be watered on the same schedule without overwatering any of them.
Classic Compatible Groupings
Humidity lovers: Pothos, peace lily, calathea, and ferns all share medium-high humidity needs and tolerate indirect light well.
Desert group: Cacti, aloe, echeveria, and jade plant all need bright light, infrequent watering, and low humidity.
Low-light tolerant: Snake plant, ZZ plant, cast iron plant, and Chinese evergreen all handle low-light environments and infrequent watering.
FAQ
Is this companion planting tool free?
Yes, completely free with no signup required. Select as many plants as you want and get instant compatibility analysis. Everything runs in your browser.
Is my data private?
All plant data and compatibility calculations happen locally in your browser. Nothing is sent to a server. Your plant selections are never stored or tracked.
What makes two houseplants compatible to grow together?
Indoor plant compatibility depends primarily on matching light requirements (both need low light or both need bright light), similar humidity preferences, comparable watering needs, and overlapping temperature tolerance. Plants with very different needs placed together will result in one thriving while the other suffers.
Can plants that prefer different light levels share a shelf?
Sometimes. A low-light plant and a medium-light plant can coexist on the same shelf if the medium-light plant tolerates lower light — just expect slower growth. However, pairing a shade-loving plant with a direct-sun cactus will damage the shade plant. The compatibility score highlights these conflicts.
Is it beneficial to group houseplants together?
Yes — grouping compatible plants creates a microclimate with slightly higher humidity as plants transpire. This benefits tropical plants that struggle in dry homes. Just ensure compatible groupings so one plant's care routine does not harm its neighbors.
How is the compatibility percentage calculated?
The tool scores four factors: light compatibility (40% weight), humidity compatibility (30%), watering frequency similarity (20%), and temperature range overlap (10%). Each factor is scored 0-100% and the weighted average gives the overall compatibility score for each plant pair.
Can incompatible plants be in the same room but not the same spot?
Absolutely. Compatibility matters most when plants share a pot, tray, or immediate grouping. A cactus and a fern can live in the same room just fine — simply place each in the microclimate that suits their individual needs. The tool helps identify which plants can share one grouped display.