When to plant Swede in Dundee

Brassica napus subsp. napobrassica

Swede
Swede · Brassica napus subsp. napobrassica

A hardy root crop for the UK, swedes do best in firm, fertile soil that has been well dug and cleared of stones. Sow outdoors in late spring to early summer, thin carefully, and keep the plants covered with fine mesh to reduce cabbage root fly damage. Lift roots from autumn onwards, and leave some in the ground where the soil drains well for harvests through winter.

40 cm · Full Sun · Moderate Water

Calibrated to Dundee · last frost ≈ 3 May

Sow outdoors May to June, harvest October to February. Frost risk October to May.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Sow outdoorsNoNoNoNoYesYesNoNoNoNoNoNo
HarvestYesYesNoNoNoNoNoNoNoYesYesYes

Growing guide

What to do through the growing season

  1. 01

    Prepare the Bed

    3 May to 17 May

    Dig the soil deeply and remove stones, then rake it to a fine, even finish for 3rd May - 17th May. Do not add fresh manure, as it can make roots fork and split.

  2. 02

    Sow Seeds

    31 May to 21 Jun Optional · repeat every 3 weeks

    Sow seeds thinly in shallow drills around 31st May - 21st June, then water the row in well. Keep the soil moist while seedlings establish, and sow a second short row 21 days later if you want a longer harvest period.

  3. 03

    Protect from Pests

    31 May to 21 Jun

    Cover the bed with fine insect-proof mesh from 31st May straight after sowing. Seal the edges well to keep out cabbage root fly and remove the cover only for weeding or thinning.

  4. 04

    Thin Seedlings

    21 Jun to 19 Jul Dates as each sowing reaches this stage

    From 21st June - 19th July, thin seedlings gradually to the final spacing so the roots can swell properly. Water the bed first, then remove the weakest plants with a small pull rather than disturbing the rest.

  5. 05

    Water and Weed

    28 Jun to 25 Oct Dates as each sowing reaches this stage Optional · repeat every 2 weeks

    From 28th June to 25th October, keep the bed evenly moist in dry spells and hoe off weeds before they compete with the crop. Check the mesh stays tight after rain and wind, and water at the base rather than over the foliage.

  6. 06

    Harvest Roots

    8 Oct to 22 Feb 2028 Dates as each sowing reaches this stage

    Lift roots from 8th October once they are a good size, then keep harvesting through 22nd February 2028. In light, free-draining soil you can leave some in the ground and take them as needed, but lift them before the roots become coarse.

Suggested varieties

Popular varieties of Swede to consider

Joan

A reliable modern swede with good-sized, round roots and steady autumn cropping.

Best of All

An old favourite with good flavour and dependable roots for the kitchen garden.

Marian

A hardy, well-fleshed variety suited to UK conditions and winter harvesting.

Swede guides by town

See how Swede timing shifts in other towns with different frost dates.