Can You Plant Tomatoes With Nasturtium?
Set your conditions — the recommendation updates instantly.
GardenSays
tomatoes + nasturtium: Yes — plant them together.
- Verdict
- Good companions
- Evidence tier
- Strong evidence
- Pairs rated
- 41
Nasturtiums work as a trap crop: aphids preferentially colonize them, keeping pressure off the tomatoes. Trap cropping is a documented technique.
Calculated result · 2 verified sources · Checked 2026-07-15 · How we decide
Why
Layout: Plant a nasturtium clump 3-6 feet from the tomatoes — far enough that aphids settle there, close enough to check and remove.
- Mechanism is supported in extension or peer-reviewed research.
- 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 × Nasturtium: rated 'good' in the GardenSays pairing table.
- 2. Strong evidenceSource guidance
Mechanism is supported in extension or peer-reviewed research.
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
Every change updates the answer, the math, the weekly steps and the share link instantly.
People also ask
What should not be planted with tomatoes?
Keep away from tomatoes: Potatoes, Corn, Cabbage, Broccoli, Kale, Fennel, Raspberry. Use caution with: Peppers, Eggplant, Strawberries, Mint, Rosemary, Sage, Lavender, Sunflower, Dill, Tomatillo, Jalapeno. Calculate yours →
What are the best tomato companion plants?
Best companions for tomatoes: Basil, Marigold, Onions, Garlic, Lettuce, Spinach, Asparagus, Nasturtium, Borage, Zinnia, Radish, Leeks. Calculate yours →
How far apart should tomatoes be planted?
Your 8×4 ft raised bed fits 8 tomatoes at 21-inch spacing. Calculate yours →
Your next decisions
More companion planting tools: see all →