Cucumbers Companion Plants
Cucumbers benefit from companion planting only when it respects their need for warmth, moisture and good ventilation. Traditional flowers may bring pollinating insects to outdoor plants, while quick crops can occupy spare ground early on. Evidence for individual pairings is limited, and in a British greenhouse avoiding dense, damp foliage is especially important.
Good companions for Cucumbers
| Plant | Why it helps |
|---|---|
| Borage | Borage flowers may attract pollinating insects to outdoor cucumbers, but keep its vigorous growth beyond the cucumber root zone. |
| Nasturtiums | Nasturtiums at the edge are traditionally used as a possible aphid distraction and provide a trailing ground cover. |
| French beans | French beans can share a sunny bed when given separate supports, making vertical use of limited space. |
| Lettuce | Lettuce can use the shaded lower space beneath trained cucumbers before conditions become too humid. |
| Radishes | Radishes are often sown as an early catch crop and harvested before cucumber roots and leaves expand. |
| Pot marigolds | Pot marigolds offer open flowers near outdoor cucumbers and fit well at the edge of a sheltered bed. |
Keep Cucumbers away from
| Plant | Why to separate them |
|---|---|
| Potatoes | Potatoes need different management and can make a cucumber area harder to water, ventilate and inspect. |
| Courgettes | Both crops make abundant foliage, so close planting can create shade and stagnant, damp conditions. |
| Sage | Sage prefers drier conditions than cucumbers, making regular watering awkward when they share a small bed. |
Tips
Grow greenhouse cucumbers with room around each plant and train them vertically where appropriate. Water the soil consistently, ventilate on warm days, and avoid overhead watering late in the day. Outside, use a sheltered position after frost risk has passed. Put companion flowers nearby rather than letting vigorous plants climb through the cucumber support.
Cucumbers companion planting: frequently asked questions
What are good companion plants for cucumbers?
Good companions for cucumbers include Borage, Nasturtiums, French beans, Lettuce, Radishes, Pot marigolds.
What should you not plant near cucumbers?
Keep cucumbers away from Potatoes, Courgettes, Sage.
How does companion planting help cucumbers?
Cucumbers benefit from companion planting only when it respects their need for warmth, moisture and good ventilation.
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Companion planting is a traditional practice; results vary with your climate, soil and garden. Page updated 19 Sep 2026.