Sow swede outdoors May to June, direct into its final position — it dislikes root disturbance — and harvest September through February once roots reach 10–15cm across. Frost sweetens the flavour, so roots can stay in the ground and be lifted as needed.
A quick 60-second SoilCommander short on growing swede in a UK garden — the essentials at a glance.
Last updated 4 July 2026
A hardy, frost-tolerant root vegetable that thrives in British winters — swede is one of the most rewarding crops for patient UK gardeners.
Not sure when to sow? See our When to Plant Swede UK →
Sowing dates and growing advice verified against RHS guidance by the SoilCommander Growing Team.
Part of the UK Vegetable Growing Guides — how-to-grow guides for every crop.
Swede Growing Calendar
| Task | Timing | Notes |
|---|---|---|
| Sow outdoors | May – June | Direct sow only — swede dislikes transplanting |
| Thin seedlings | June – July | Thin to 23cm apart in rows 38cm apart |
| Harvest | September – February | Frost improves flavour; leave in ground until needed |
Best Varieties
- Marian — most popular UK variety; excellent club root resistance; RHS AGM
- Ruby — compact, uniform; good disease resistance
- Brora — bred for Scottish conditions; very hardy
Common Swede Mistakes
- Transplanting seedlings — swede dislikes root disturbance; always direct-sow where it will grow.
- Growing in acidic soil — club root thrives below pH 7.0; lime the soil if needed and choose a resistant variety such as Marian, Brora, or Magres AGM.
- Inconsistent watering — causes roots to split or turn bitter; water evenly through dry spells rather than in one heavy soak.
- Skipping insect-proof mesh — cabbage root fly and caterpillars target unprotected plants; cover from sowing.
Frequently Asked Questions
When should I sow swede in the UK?
Direct-sow outdoors May to June — swede dislikes transplanting, so sow it where it will grow. Harvest runs September through February; frost improves the flavour.
How do I stop club root in swede?
Choose a resistant variety such as Marian, Brora, or Magres AGM, and keep soil pH at 7.0 or above — club root thrives in acidic soil. Crop rotation also helps break the disease cycle.
Why are my swede roots splitting or turning bitter?
Inconsistent watering is the usual cause. Keep soil evenly moist through dry spells and mulch to retain moisture, rather than watering heavily after a dry period.
Plan Your Swede Season, Start to Harvest
Get liming reminders to keep club root at bay, plus sowing and harvest windows for swede and 38 other UK crops.
Get the Garden PlannerBrowse all sowing dates: UK vegetable planting calendar · All guides: UK vegetable growing guides
Tools That Help With This Crop
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Plan the next step
Use the printable UK Vegetable Garden Planner to turn this guide into sowing dates, bed layouts, and weekly garden tasks.