Radish Companion Plants
Vegetable30 days to maturity
Radish is a fast, cool-season root crop in the cabbage family that can go from seed to harvest in as little as three to four weeks. Its quick germination makes it a favorite for marking slow-sprouting rows and breaking up the soil surface. Common troubles include flea beetles peppering the leaves, root maggots tunneling the roots, and plants that bolt or grow all tops and no bulb in warm weather.
Companion Checker: what grows well with Radish?
Tap any plant to see whether it pairs well with Radish and why. Green means a beneficial companion, red means keep them apart.
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Companion Planting Strategy for Radish
Radishes mature so quickly and take so little room that they slot in alongside almost everything as a catch crop. The companion strategy is to use their speed to loosen soil and mark rows for slower seeds, and their leaves as a trap crop that draws flea beetles and cucumber beetles away from more valuable plants.
Best Companion Plants for Radish
These plants grow well alongside Radish — providing pest control, attracting pollinators, or making better use of your garden space.
Radishes and lettuce mature at different speeds and root depths, so the quick radishes are pulled before the slower lettuce needs the space, making efficient use of one bed.
Fast-sprouting radishes mark the rows and loosen the crust for slow-germinating carrots, then are harvested before the carrots need the room.
Radishes interplanted among cucumbers act as a trap crop, luring cucumber beetles and flea beetles to the radish leaves instead of the cucumber vines.
What Not to Plant With Radish
Keep these away from Radish. They compete for resources, attract shared pests, or inhibit each other's growth.
Hyssop is one of the few plants traditionally said to be incompatible with radishes, as its strong aromatic oils are thought to inhibit radish growth.
How to Grow Radish
- Botanical name
- Raphanus sativus
- Family
- Mustard (Brassicaceae)
- Sun
- Full sun to partial shade, 6+ hours preferred
- Water
- Consistent moisture, about 1 inch per week to prevent woodiness and cracking
- Soil
- Loose, stone-free, well-draining soil, pH 6.0-7.0
- Spacing
- 1-2 inches apart in rows 6-12 inches apart
- Planting depth
- 1/2 inch deep
- Germination
- 3-7 days at 55-75F
- Days to maturity
- 22-30 days for spring types; 50-70 days for winter and daikon radishes
- When to plant
- Sow as soon as soil is workable in early spring, succession sow every 1-2 weeks, and plant again in late summer for fall
- Harvest
- Pull as soon as roots reach full size, about 1 inch across for round types, before they turn pithy or woody
Common Radish Problems
Flea beetles (tiny black beetles leaving shot-hole damage in leaves)
Cover seedlings with floating row covers, dust with kaolin clay, and keep beds weed-free; the roots usually still size up even with chewed leaves, and radishes also serve as a trap crop.
Cabbage root maggot (white larvae tunneling the roots)
Use row covers from sowing, rotate away from other brassicas, avoid fresh manure, and place collars or sow in cooler weather when fly activity is lower.
All leaves and no bulb (lush tops but tiny or no root)
Caused by hot weather, crowding, or excess nitrogen; thin seedlings to proper spacing, plant in cool weather, and use a balanced low-nitrogen soil.
Cracked or split roots
Result from uneven watering after dry spells; keep soil evenly moist and harvest promptly once roots reach full size rather than leaving them in the ground.
Radish Companion Planting FAQ
What are the best companion plants for radish?
Lettuce, carrots, and cucumbers are excellent companions for radish. Radishes mature fast and are harvested before lettuce and carrots need the space, while among cucumbers they act as a trap crop for flea beetles and cucumber beetles. They also pair well with beans, peas, and spinach.
What should you not plant with radish?
Hyssop is traditionally kept away from radishes because its strong aromatic oils are believed to stunt their growth. It is also best to avoid planting radishes with other brassicas like cabbage and broccoli in the same spot, since they share pests such as flea beetles and root maggots.
How long do radishes take to grow?
Spring salad radishes are one of the fastest vegetables you can grow, ready to harvest in just 22-30 days from sowing. Larger winter and daikon types take longer, around 50-70 days, and should be pulled promptly once mature to avoid a pithy, woody texture.
Can you plant radishes with carrots?
Yes, radishes and carrots are a classic pairing. Sow them together so the fast radishes germinate quickly to mark the row and loosen the soil crust, then harvest the radishes within a month, leaving room for the slower carrots to size up.
More vegetable companions
Plan Your Radish Garden
Use our interactive tools to design the perfect garden with Radish and its companions.