Cauliflower Companion Plants
Cauliflower is a heavy-feeding cool-season brassica that many gardeners pair with strong-scented herbs and alliums to help confuse cabbage moths, cabbage worms, and aphids. Low-growing greens can share the bed while the cauliflower fills out, and a few flowering plants nearby draw pollinators and beneficial insects. Companion planting is traditional folk practice, so treat these pairings as a helpful starting point rather than a guarantee.
Good companions for Cauliflower
| Plant | Why it helps |
|---|---|
| Dill | Its flowers attract beneficial insects that prey on aphids and cabbage worms. |
| Onions | The strong scent is thought to mask cauliflower and deter common brassica pests. |
| Nasturtium | Often planted as a trap crop that pulls aphids away from the cauliflower. |
| Marigold | Bright blooms bring in pollinators and beneficial insects while adding color. |
| Bush beans | As a legume it helps enrich the soil for this hungry crop and stays out of its way. |
| Lettuce | Shallow-rooted and quick to harvest, it uses the open space before cauliflower spreads. |
| Beets | Grows at a different depth so the two crops rarely compete for the same root zone. |
| Chamomile | A traditional brassica companion said to support vigor and draw in helpful insects. |
Keep Cauliflower away from
| Plant | Why to separate them |
|---|---|
| Broccoli | Another brassica that shares the same pests, diseases, and heavy nutrient demands. |
| Cabbage | Grouping brassicas together concentrates cabbage worms and can strain the soil. |
| Tomatoes | A heavy feeder that competes strongly for nutrients and garden space. |
| Strawberries | Traditionally kept apart because they compete and can harbor shared pests. |
| Pole beans | Tall climbers may shade the crop, and many gardeners avoid this pairing. |
Tips
Give cauliflower rich, steadily moist soil and space, since crowding it against other heavy feeders usually hurts head formation. Tuck aromatic herbs and alliums along the row edges and use a trap crop like nasturtium at the border to lure aphids away. Rotate where you plant brassicas each year, and remember that results vary with your climate, soil, and local pest pressure.
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Companion planting is a traditional practice; results vary with your climate, soil, and garden. Page updated Aug 4, 2026.