How to grow Swede in the UK
Brassica napus
Swede (Brassica napus) is a vegetable that grows well in UK gardens. Hardy winter crop — improves with frost. Net against cabbage white butterflies. This guide covers when and how to sow Swede, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
When to sow & grow Swede
Sowing and harvest window through the year (UK):
Jan Harvest | Feb Harvest | Mar Harvest | Apr | May Sow | Jun Sow | Jul | Aug | Sep | Oct Harvest | Nov Harvest | Dec Harvest |
Soil, position & care
- Soil
- Firm, fertile soil — lime if acid
- Soil pH
- 6.5–7.5
- Position
- Open, sunny site
- Sowing depth
- 1.5 cm
- Spacing
- Thin to 23 cm, rows 38 cm
- Sowing
- Sow direct May–Jun
- Growing
- Keep weed-free and evenly watered; mulch to hold moisture
- Harvest & upkeep
- Lift through autumn/winter; very hardy
- Watch for
- Club root, flea beetle, powdery mildew
Companion planting for Swede
Grows well with:
Keep apart from:
Add Swede to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Swede FAQs
When should I sow Swede in the UK?
In the UK, sow Swede in May, June. Sowing across these months gives the plant the right soil temperature and day length to establish well.
What grows well with Swede?
Swede grows well alongside Beetroot, Celery, Dill, French Marigold, Pot Marigold, Mint. Good companions can deter pests, attract pollinators or make better use of space.
What should you not plant near Swede?
Keep Swede away from Strawberry, Beef Tomato, Cherry Tomato, which can compete with it or share pests and diseases.
How much sun does Swede need?
Swede prefers full sun (6+ hrs direct).
When is Swede ready to harvest?
Swede is typically ready to harvest in January, February, March, October, November, December in the UK.
Is Swede easy to grow?
Easy — good for beginners. Hardy winter crop — improves with frost. Net against cabbage white butterflies.