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Hand holding freshly harvested red radishes with greens attached

Radishes

Raphanus sativus

beginner level

The fastest growing vegetable in the garden, radishes are perfect for beginners and great for succession planting.

Photo: Unsplash via Unsplash

Quick Growing Facts

Sun Requirements
full sun
Water Needs
moderate
Time to Harvest
22-30 days
Hardiness Zones
2-10
Mature Size
1-4 inches
Soil Type
Loose, well-draining

Soil & Bed Preparation

Rake beds to create a fine seedbed free of stones bigger than a pea. Radishes grow best in loose soil with plenty of organic matter.

Watering & Feeding

Mist lightly after sowing and keep soil consistently moist until harvest. Uneven watering can cause woody or spicy roots.

A light application of balanced organic fertilizer at sowing is sufficient. Excess nitrogen produces leafy tops with small roots.

Training & Maintenance

Thin seedlings to 2 inches apart once they emerge. Crowded plants stay small and develop tapered roots.

Harvest & Storage

Harvest within the recommended days to maturity while roots are crisp. Remove tops immediately and store roots in a sealed container in the refrigerator for up to two weeks.

Planting Instructions

  • Direct sow as soon as soil can be worked
  • Plant ½ inch deep
  • Space 1-2 inches apart
  • Succession plant every 10 days

Care Instructions

  • Keep soil consistently moist
  • Harvest promptly when mature
  • Thin if overcrowded
  • Cool weather crop - provide shade in summer

Seasonal Growing Calendar

Early spring

  • Direct sow 3 to 4 weeks before the last frost date.
  • Cover with insect netting to deter flea beetles.
  • Succession sow every 10 days for steady harvests.

Early summer

  • Switch to heat-tolerant varieties and provide partial shade in hot climates.
  • Water daily during heat waves to keep roots tender.
  • Harvest promptly before roots become pithy.

Fall

  • Direct sow 6 weeks before first frost for a final round.
  • Mulch lightly to retain moisture and moderate soil temperature.
  • Grow daikon in late summer as a bio-tilling cover crop.

Companion Plants

Carrots
Lettuce
Peas
Spinach

These plants grow well together and can provide mutual benefits like pest control, improved soil health, and efficient space usage.

Common Pests & Issues

Flea beetles
Root maggots
Aphids

Watch out for these common pests and diseases. Early detection and prevention are key to maintaining healthy plants.

Troubleshooting Guide

IssueHow to fix it
Hollow centersHarvest earlier and keep soil moisture consistent throughout the crop cycle.
Flea beetle damageUse floating row cover, encourage beneficial insects, and apply neem oil if populations surge.
Roots fail to bulbThin seedlings to proper spacing and avoid high nitrogen fertilizers.

Recommended Varieties

Cherry Belle

Classic round red radish ready in under a month with mild flavor.

22 days

French Breakfast

Oblong pink-and-white roots with crisp texture and gentle heat.

25 days

Miyashige Daikon

Long white roots perfect for kimchi, stir-fries, and soil loosening.

60 days

Succession Ideas

  • Sow radishes as a marker crop alongside carrots or parsnips.
  • Rotate plantings every few weeks to stay ahead of root maggot pressure.
  • Use daikon radishes in late summer as a living cover crop.

🍽️ Culinary Uses

Raw in salads
Roasted
Pickled
Radish greens

💪 Nutritional Benefits

Vitamin C
Fiber
Potassium
Low calorie

Ready to Start Growing Radishes?

Check out our companion planting guides and learn about creating productive plant guilds for your garden.