Cauliflower Companion Plants
Cauliflower can be rewarding in UK gardens but is less forgiving than many brassicas, needing steady growth without checks. It shares cabbage white caterpillars with cabbage, broccoli and kale. Aromatic herbs and strong-scented plants are traditional decoys with limited evidence, so use them alongside fine mesh, regular checks and sensible crop rotation.
Good companions for Cauliflower
| Plant | Why it helps |
|---|---|
| French beans | After bean crops, legume roots may leave nitrogen behind, while separate rows avoid crowding the cauliflower canopy. |
| Beetroot | Beetroot can use open ground around young plants, provided it is harvested before cauliflower needs full space. |
| Celery | Celery suits similarly moisture-retentive beds and adds a different plant form to the plot. |
| Dill | Dill is traditionally planted near brassicas for its scent and its flowers may attract beneficial insects. |
| Thyme | Low thyme is a traditional strongly scented companion, best kept around bed margins to preserve airflow. |
| Nasturtiums | Nasturtiums are commonly used as a possible distraction planting for aphids and caterpillars, with mixed results. |
| French marigolds | French marigolds provide compact flowering edges and may increase insect activity around the bed. |
Keep Cauliflower away from
| Plant | Why to separate them |
|---|---|
| Cabbage | Cabbage has the same brassica pests, including cabbage white caterpillars, and should not share a rotation slot. |
| Broccoli | Broccoli competes for similar nutrients and concentrates the same pests and diseases in one area. |
| Kale | Kale is closely related and can carry brassica problems forward if grown repeatedly in the same ground. |
| Sweetcorn | Its height and broad leaves can shade cauliflower, which needs consistent, open growing conditions. |
Tips
Choose a variety suited to your sowing season, plant into firm ground and never let plants dry out badly. Cover early with fine insect mesh against cabbage white butterflies and inspect leaves after wind damage. When curds form, fold leaves loosely over white types if needed. Rotate away from all brassicas and do not follow another brassica.
Cauliflower companion planting: frequently asked questions
What are good companion plants for cauliflower?
Good companions for cauliflower include French beans, Beetroot, Celery, Dill, Thyme, Nasturtiums, French marigolds.
What should you not plant near cauliflower?
Keep cauliflower away from Cabbage, Broccoli, Kale, Sweetcorn.
How does companion planting help cauliflower?
Cauliflower can be rewarding in UK gardens but is less forgiving than many brassicas, needing steady growth without checks.
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Companion planting is a traditional practice; results vary with your climate, soil and garden. Page updated 18 Sep 2026.