Melons Companion Plants
Melons need sustained warmth, sunshine and a long season, so most British gardeners grow them in a greenhouse or polytunnel. Outdoor crops are possible only in particularly warm, sheltered places and favourable summers. Companion plants may make good use of nearby space or attract insects, but they cannot guarantee pollination, pest control or ripe fruit.
Good companions for Melons
| Plant | Why it helps |
|---|---|
| Basil | Potted basil suits the same warm greenhouse conditions and can be moved easily to maintain airflow around melon stems. |
| French marigolds | French marigolds provide compact flowers near greenhouse doors or containers, although their pest-control reputation is not strongly supported by evidence. |
| Borage | Borage flowers may encourage insect activity near an open greenhouse, but grow it outside or in a separate large pot because it becomes sizeable. |
| Spring onions | Spring onions are slim enough for a greenhouse border and are usually harvested before melon vines demand more room. |
| Lettuce | Lettuce can fill bare ground at the start of the season, provided it is removed if melon foliage begins restricting light or ventilation. |
| Coriander | Coriander in a separate pot is a compact companion early on and can flower for insects without tangling with melon vines. |
Keep Melons away from
| Plant | Why to separate them |
|---|---|
| Cucumbers | Both are vigorous greenhouse climbers and can create dense, humid growth; separate them if space and ventilation are limited. |
| Aubergines | Aubergines need warmth too, but mixing large plants too closely reduces light and airflow around both crops. |
| Courgettes | Courgettes sprawl rapidly and can overwhelm melon space outdoors or under cover, making watering and pest checks more difficult. |
Tips
Choose a greenhouse-friendly variety and plant into a warm, fertile bed or large container after cold nights have passed. Train stems to supports where appropriate, allowing good airflow and easy access for pollinating insects. Water consistently at the roots, then avoid prolonged damp foliage. Ventilate daily in warm weather and do not overcrowd the house.
Melons companion planting: frequently asked questions
What are good companion plants for melons?
Good companions for melons include Basil, French marigolds, Borage, Spring onions, Lettuce, Coriander.
What should you not plant near melons?
Keep melons away from Cucumbers, Aubergines, Courgettes.
How does companion planting help melons?
Melons need sustained warmth, sunshine and a long season, so most British gardeners grow them in a greenhouse or polytunnel.
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Companion planting is a traditional practice; results vary with your climate, soil and garden. Page updated 18 Sep 2026.