How to grow Radish in the UK
Raphanus sativus
Radish (Raphanus sativus) is a vegetable that grows well in UK gardens. First-time-grower's friend. Pull when marble-sized — they go woody if left. This guide covers when and how to sow Radish, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
When to sow & grow Radish
Sowing and harvest window through the year (UK):
Jan | Feb | Mar Sow | Apr Sow | May Sow · Harvest | Jun Harvest | Jul Sow · Harvest | Aug Harvest | Sep Harvest | Oct | Nov | Dec |
Soil, position & care
- Soil
- Fertile, free-draining soil enriched with garden compost
- Soil pH
- 6.5–7.0
- Position
- Open, sunny site
- Sowing depth
- 1 cm
- Spacing
- 2.5 cm apart, rows 15 cm
- Sowing
- Sow direct little-and-often Mar–Sep
- Growing
- Keep weed-free and evenly watered; mulch to hold moisture
- Harvest & upkeep
- Pull at marble size before they go woody
- Watch for
- Flea beetle (pepper-hole leaves); slugs
Companion planting for Radish
Grows well with:
Add Radish to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Radish FAQs
When should I sow Radish in the UK?
In the UK, sow Radish in March, April, May, July. Sowing across these months gives the plant the right soil temperature and day length to establish well.
What grows well with Radish?
Radish grows well alongside Carrot, Cucumber, Lettuce, Nasturtium, Garden Pea, Spinach. Good companions can deter pests, attract pollinators or make better use of space.
How much sun does Radish need?
Radish prefers full sun (6+ hrs direct).
When is Radish ready to harvest?
Radish is typically ready to harvest in May, June, July, August, September in the UK.
Is Radish easy to grow?
Easy — good for beginners. First-time-grower's friend. Pull when marble-sized — they go woody if left.