Tradition
No chart mentions this pair.
Cauliflower
Brassica oleracea var. botrytis
Brassicaceae
Radish
Raphanus sativus
BrassicaceaeCan you plant cauliflower and radishes together?
Yes, with care. Cauliflower and radishes are close relatives: both are in the Brassicaceae 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. Cauliflower and radishes are both in the Brassicaceae 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)No clear effect on harvest. In a field trial, growing them together made no clear difference to harvest.
What to plant with cauliflower and radishes
Good neighbours of both, best tested first.
BeanWith cauliflower: Bigger combined harvestWith radishes: 21% more harvest
What to keep away from cauliflower and radishes
CarrotWith radishes: 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 Brassicaceae: often susceptible to the same diseases and insects. Source: Iowa State University Extension and Outreach, Yard and Garden
Research
No effect
avoidgood
1 paper found: 0 positive, 0 negative, 1 no effect.
yield / land use
auto-classified not reviewed by a person
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 cauliflower and radishes
Plants that are good neighbours of each. Biggest harvest gain first; each cell links to the evidence for that pair.
| Plant | With cauliflower | With radishes |
|---|---|---|
| Bean | Bigger combined harvestField trial, 1 study. Charts: recommend.Evidence for cauliflower and beans | 21% more harvest from the same spaceField trial, 1 study. Charts: recommend.Evidence for radishes and beans |
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).
The evidence, with sources
- No effectyield / land usefield trialauto-classifiedIntercropping based on cauliflower: more productive, profitable and highly sustainableIntercropping based on cauliflower: More productive, profitable and highly sustainable (Yildirim · 2005)Relevance 97% · effect confidence 14%
- Both in Brassicaceae: 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 cauliflower and of radish, or every pair at once in the companion planting chart.
Have you grown cauliflower and radishes 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.