Tradition
No chart mentions this pair.
Cucumber
Cucumis sativus
Cucurbitaceae
Squash & pumpkin
Cucurbita spp.
CucurbitaceaeCan you plant cucumbers and squash together?
Yes, with care. Cucumbers and squash are close relatives: both are in the Cucurbitaceae family, so they share pests and diseases. Nothing we found says they help or harm each other beyond that.
What to watch for
Same family, shared pests. Cucumbers and squash are both in the Cucurbitaceae family, so the same pests and diseases can move from one to the other.
Crop Rotation in the Vegetable Garden (Steil · 2025 · Iowa State University Extension and Outreach, Yard and Garden)
What to plant with cucumbers and squash
Good neighbours of both, best tested first.
LettuceWith cucumbers: 35% more harvestWith squash: 10% more harvest
TomatoWith cucumbers: 17% more harvestWith squash: 18% more harvest
BeanWith cucumbers: 14% more harvestWith squash: 17% more harvest
Sweet cornWith cucumbers: Fewer pestsWith squash: 13% more harvest
RadishRecommended by garden charts for both, not tested yet
What to keep away from cucumbers and squash
PotatoWith cucumbers: Garden charts advise against it, not testedWith squash: Garden charts advise against it, not tested
The evidence in detail
For readers who want to dig in: every chart entry, study and yield trial behind the answer above, with the numbers.
Tradition, research and yield trials
Same family, shared pests and diseases. Both in Cucurbitaceae: often susceptible to the same diseases and insects. Source: Iowa State University Extension and Outreach, Yard and Garden
Research
No papers found on this pair.
Yield trial
No intercropping yield trial.
Same family, careful
What happens above and below ground
Each animation illustrates a mechanism a study reported for this pair. Pick a card to focus on it.
Everything at once.
Companion plants for both cucumbers and squash
Plants that are good neighbours of each. Biggest harvest gain first; each cell links to the evidence for that pair.
| Plant | With cucumbers | With squash |
|---|---|---|
| Lettuce | Fewer pests35% more harvest from the same spaceField trial, 5 studies. Charts: recommend.Evidence for cucumbers and lettuce | 10% more harvest from the same spaceField trial, 1 study. Charts: not listed.Evidence for squash and lettuce |
| Tomato | Lures pests away17% more harvest from the same spaceField trial, 4 studies. Charts: recommend.Evidence for cucumbers and tomatoes | 18% more harvest from the same spaceField trial, 1 study. Charts: recommend.Evidence for squash and tomatoes |
| Bean | 14% more harvest from the same spaceField trial, 1 study. Charts: recommend.Evidence for cucumbers and beans | Fewer pests and better soil and nutrient uptake17% more harvest from the same spaceField trial, 7 studies. Charts: recommend.Evidence for squash and beans |
| Sweet corn | Fewer pestsField trial, 1 study. Charts: not listed.Evidence for cucumbers and corn | 13% more harvest from the same spaceField trial, 4 studies. Charts: recommend.Evidence for squash and corn |
Harvest from the same space compares a bed with both crops against the same area split into single-crop beds, counting the harvest of both crops (the land equivalent ratio in yield trials).
Recommended by garden charts for both, not tested yet
The evidence, with sources
- Both in Cucurbitaceae: often susceptible to the same diseases and insectsCrop Rotation in the Vegetable Garden (Steil · 2025 · Iowa State University Extension and Outreach, Yard and Garden)
All neighbours of cucumber and of squash & pumpkin, or every pair at once in the companion planting chart.
Have you grown cucumbers and squash together?
Tell other gardeners what happened: spacing, pests, harvest, or ask a question. Reader notes are not checked by us and do not change the verdicts on this page.