🌱 Free Guide · Updated 2026
What grows best together in your raised beds — the science-backed combinations that improve yield, suppress pests, and make the most of every square foot.
Join 2,400+ homesteaders planning better gardens with Tended.
No spam. Free forever. Unsubscribe anytime.
Companion planting is not folklore. The mechanisms are real — and understanding them lets you choose combinations strategically rather than following lists you don't understand.
Legumes (beans, peas, clover) host bacteria in root nodules that pull nitrogen from air and fix it into soil. Heavy feeders planted nearby — corn, squash, brassicas — benefit directly from this nitrogen release.
Strong-scented plants (basil, marigolds, nasturtiums) interfere with pest navigation. Aphids, whiteflies, and cabbage moths orient by scent — masking your crops with aromatic neighbors disrupts their host-finding ability.
Flowering plants near crops attract predatory insects — parasitic wasps, hoverflies, lacewings — that prey on aphids and caterpillars. Dill, fennel, and yarrow are particularly effective at drawing beneficials.
Tall plants shade the bed, keeping moisture in soil and suppressing weeds. Low-growing plants use the shadowed space beneath. Vining plants use vertical space while ground covers protect soil. This stacking produces more food per square foot than monoculture.
The 15 most common raised bed vegetables — their best companions and worst neighbors. Plant the greens together. Keep the reds apart.
| Plant | Good Companions | Bad Neighbors | Why |
|---|---|---|---|
| 🍅 Tomatoes | BasilCarrotsMarigoldsParsley | FennelBrassicasCorn | Basil repels thrips and aphids, improves flavor. Fennel stunts tomato growth via allelopathic root compounds. |
| 🌽 Corn | BeansSquashCucumberPumpkin | TomatoesCelery | The Three Sisters: beans fix nitrogen for corn; squash shades soil, retaining moisture for all three. |
| 🥕 Carrots | OnionsLeeksTomatoesRosemary | DillParsnips | Onions repel carrot fly; rosemary's scent confuses root fly. Dill can cross-pollinate and affect carrot flavor. |
| 🥬 Lettuce | RadishesCarrotsStrawberriesChives | CeleryParsley | Radishes mark rows, deter root pests, and are harvested before lettuce needs the space. Chives repel aphids. |
| 🌿 Basil | TomatoesPeppersOregano | SageThyme | Tomato-basil is the classic pairing: mutual pest deterrence and reportedly improved flavor. Keep away from woodier herbs. |
| 🧅 Onions & Garlic | CarrotsTomatoesLettuceStrawberries | BeansPeasAsparagus | Allium sulfur compounds inhibit bean and pea germination. Onions with strawberries deter aphids from both crops. |
| 🥦 Brassicas (Cabbage, Broccoli, Kale) | DillNasturtiumsOnionsMarigolds | StrawberriesTomatoesPole beans | Nasturtiums act as a trap crop for aphids. Dill attracts predatory wasps that parasitize cabbage caterpillars. |
| 🥒 Cucumbers | BeansCornSunflowersNasturtiums | SageFennelMelons | Sunflowers provide a climbing structure and attract pollinators. Nasturtiums deter cucumber beetles. |
| 🫑 Peppers | BasilTomatoesCarrotsMarigolds | FennelKohlrabi | Basil deters aphids and spider mites on peppers. Marigolds repel nematodes in the soil around pepper roots. |
| 🫘 Beans | CornSquashCarrotsCucumber | OnionsGarlicFennel | Beans fix nitrogen for heavy-feeding neighbors. Onions and garlic sulfur compounds inhibit bean growth significantly. |
| 🎃 Squash | CornBeansNasturtiumsBorage | PotatoesFennel | Squash large leaves shade soil for the Three Sisters. Borage deters hornworms and improves squash pollination. |
| 🌻 Marigolds | EverythingTomatoesPeppersRoses | None known | French marigold root exudate suppresses soil nematodes. Aerial scent deters whiteflies, thrips, and aphids on nearly any crop. |
| 🌺 Nasturtiums | BrassicasCucumbersSquashTomatoes | None known | Trap crop: aphids prefer nasturtiums, keeping them off your crops. Sacrifice the nasturtium, harvest it with the aphids, replant. |
| 🍓 Strawberries | SpinachLettuceBorageOnions | BrassicasFennelMelons | Borage improves strawberry flavor and deters worms. Onions deter aphids and slugs from strawberry beds. |
| 🥔 Potatoes | BeansHorseradishMarigoldsCorn | TomatoesSquashCucumbersSunflowers | Tomatoes and potatoes share blight diseases — planting together concentrates risk. Horseradish deters Colorado potato beetle. |
These are combinations with documented performance — backed by both indigenous agricultural tradition and modern horticultural research. Start with these if you're new to companion planting.
The foundational companion planting system, developed by Indigenous North American farmers over centuries. Corn provides a trellis for beans, beans fix nitrogen for corn and squash, squash leaves shade soil to retain moisture and suppress weeds. Works best in a 4x4 bed or larger.
Basil deters aphids and thrips while improving tomato flavor. Marigolds suppress soil nematodes around roots. Carrots loosen compacted soil between tomato plants and can be harvested while tomatoes are still maturing.
Brassicas are magnets for aphids and cabbage caterpillars. Nasturtiums act as a trap crop for aphids. Dill flowers attract parasitic wasps that lay eggs in caterpillars. Onions deter root flies. Combined, this dramatically reduces pest pressure on brassicas without sprays.
Radishes germinate in 3–5 days and mark the slower-growing lettuce rows. Chives' allium scent deters aphids from lettuce. Spinach fills in as a low-light crop under taller lettuces. Stagger plantings every 2 weeks for continuous harvest.
Beans fix nitrogen for cucumber's heavy feeding needs. Nasturtiums deter cucumber beetles, which spread bacterial wilt. Dill attracts predatory insects while improving cucumber pollination rates. Plant at the base of a trellis for vertical efficiency.
Plant a border of mixed alliums around your raised bed. Their sulfur compounds create a perimeter barrier against aphids, carrot flies, and slugs. Chives flower most of the season, attracting pollinators to anything planted within their reach. Harvest the greens; let a few flower for beneficial insects.
Track what you planted, where, and what worked — so next season's companion planting is better than this one.
No spam. Unsubscribe anytime.
Companion planting only works at the right spacing. Too close and you create competition. Too far and the beneficial effects don't reach. These are the square-foot gardening spacings for a 4x4 raised bed.
Indeterminate need more space; determinate can be 1 per 2 sq ft.
Needs room for full head development. One plant per 24" square.
Plant in blocks, not rows, for wind pollination. Minimum 4x4 block.
Dense planting works. Pick regularly to extend production.
4 rows of 4 per square foot. Thin to 2" spacing after sprouting.
Head lettuce needs 12" spacing. Leaf lettuce can be 4 per sq ft.
Can be densely planted. Harvest every other one as scallions, leaving the rest to bulb.
One healthy basil plant fills a full square foot at maturity. Plant at bed edges near tomatoes.
Plant at corners and between beds as a border. Replace with French marigold for nematode control.
The best companion planting beds produce a harvest that works beautifully together in the kitchen too. These recipes make the most of what grows side by side.
Uses tomatoes, peppers, squash, and basil — exactly what grows best together in a raised bed.
Freeze pesto in ice cube trays in July for fresh garden flavor all winter. Uses basil before it bolts.
Cucumber and dill grown as companions make the best pickles together. Ready in 24 hours.
Organized by season and ingredient — built for what you actually grow.
Track garden beds, harvests, and what grew best together — so every season is better than the last.
Put your harvest to work — these recipes pair with what this guide helps you grow.
Eggs poached directly in a spiced tomato and pepper sauce. One pan, minimal cleanup, and t…
⏱ 30 minA fast, classic omelette showcasing the brightness of garden herbs. Perfect when you've go…
⏱ 10 minCrispy pan-fried cakes that are the best answer to a zucchini surplus. Serve with a dollop…
⏱ 20 minThe simplest recipe when tomatoes are peak ripe. Great tomatoes need almost nothing — just…
⏱ 10 minThe classic Provençal stew that was invented precisely for garden surplus. Tomatoes, zucch…
⏱ 1 hr