Can You Plant Tomatoes With Radish?
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GardenSays
tomatoes + radish: Yes — plant them together.
- Verdict
- Good companions
- Evidence tier
- Practical compatibility
- Pairs rated
- 41
Fast in, fast out: radishes mature in 3-4 weeks, before tomatoes need the room, and are traditionally used as a flea-beetle trap crop.
Calculated result · 2 verified sources · Checked 2026-07-15 · How we decide
Why
Layout: Sow between transplants at planting time; harvest before the canopy closes.
- Not formally studied as a pairing, but the reasoning is a real, verifiable resource/timing/ecological fact (shade, root depth, season length, shared needs) — not a claimed pest-repelling magic.
- Companion planting tweaks the odds — spacing, rotation, and airflow still matter more than any pairing.
When this doesn't apply
- If either plant has had disease problems in this spot before, rotation history outweighs the pairing benefit.
How this was calculated
- 1. Pairing lookupGood companionsSource guidance
Tomato × Radish: rated 'good' in the GardenSays pairing table.
- 2. Practical compatibilityCalculated result
Not formally studied as a pairing, but the reasoning is a real, verifiable resource/timing/ecological fact (shade, root depth, season length, shared needs) — not a claimed pest-repelling magic.
Data sources
- University of Minnesota Extension — Companion planting in home gardens — Some companion effects (trap crops, pollinator attraction, nematode suppression by marigolds) are documented; many traditional pairings lack formal evidence. (checked 2026-07-15)
- University of Minnesota Extension — Growing tomatoes in home gardens — Avoid planting tomatoes near potatoes (shared blight) or where related crops grew the previous year. (checked 2026-07-15)
What changes this answer
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