Companion Plant Guide
Lettuce
Fast growing, breaks soil compaction.
Vegetable · Brassica family
Radish companion plants
Raphanus sativus
What to plant with radishes, what to keep apart, and how to grow them — sun, spacing, soil and the reason behind every pairing.
Photo: Caroline Attwood on Unsplash
Overview
Growing radishes beside the right neighbour
Radish (Raphanus sativus) is a vegetable in the Brassica family. Quick-growing root vegetable perfect for succession planting.
The fastest catch crop there is — sow into any gap and pull it before it crowds.
Give plants 2–3 in in sun or part shade. Aim for well-draining, fertile soil. In most gardens the crop sits in USDA zones 2-11 and is ready in about 25-30 days.
Grows well with
What to plant with radishes
The best companion plants for radishes in this guide are Lettuce, Cucumber, Spinach, Carrot, Pea, Bean, Squash, and Nasturtium. Each pairing below is a reason to share a bed — pest masking, roots that do not compete, or insects that hunt the pests drawn to radishes.
Cucumber
Soil loosening for cucumber.
Spinach
Succession planting partnership.
Carrot
Sow together — radishes come up first and loosen the soil for slow carrots.
Pea
Peas fix nitrogen; radishes are pulled before the peas need the room.
Bean
Radishes are harvested long before the beans spread.
Squash
Radishes sown around the vines are said to deter squash bugs and beetles.
Nasturtium
Draws aphids and flea beetles away from the row.
Keep apart
What not to plant with radishes
Keep radishes away from Cabbage. These neighbours compete for the same food, release chemicals that stunt growth, or otherwise hold the crop back.
Cabbage
Shares flea beetles and cabbage root fly — they spread between the two.
In the bed
How to grow radishes
| Sun | Sun or part shade |
|---|---|
| Spacing | 2–3 in |
| Soil | Well-draining, fertile soil |
| Hardiness | Zones 2-11 |
| Days to maturity | 25-30 |
These notes sit beside the companion lists — they are how radish actually occupies the bed, not a substitute for local climate.
- Sow seeds every 2 weeks for continuous harvest
- Thin seedlings to proper spacing
- Harvest when small and tender
- Breaks up soil for other crops
Questions
Radish companion planting FAQ
What can I plant next to radishes?
Plant Lettuce, Cucumber, Spinach, Carrot, Pea, Bean, Squash, and Nasturtium beside radishes. Lettuce: Fast growing, breaks soil compaction. Cucumber: Soil loosening for cucumber. Spinach: Succession planting partnership. Carrot: Sow together — radishes come up first and loosen the soil for slow carrots. Pea: Peas fix nitrogen; radishes are pulled before the peas need the room. Bean: Radishes are harvested long before the beans spread. Squash: Radishes sown around the vines are said to deter squash bugs and beetles. Nasturtium: Draws aphids and flea beetles away from the row.
What should I not plant with radishes?
Keep radishes apart from Cabbage. Cabbage: Shares flea beetles and cabbage root fly — they spread between the two.
How much sun do radish plants need?
Radish plants want sun or part shade. Space them 2–3 in apart in well-draining, fertile soil.
How long do radish plants take to mature?
Most radish plants are ready in about 25-30 days. Radish grows in USDA hardiness zones 2-11.
Compare every pairing at a glance
Open the guide, pick radish, and see what thrives alongside it — and what quietly holds it back.
Open the pairing guide