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Swede, how to sow, grow and get large roots for winter

Swede, Brassica napobrassica
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A heavy, firm root with flesh so thick it blunts a vegetable peeler, swede is mashed, baked with cheese or cut into chips like a potato. Called rutabaga when the flesh is yellow, this ancient heirloom belongs to cold, moist winters: give it humus-rich, free-draining soil and it will shrug off frost in the ground.

Swede at a glance
Name Rutabaga
Family Brassicaceae
Type vegetable
Height 12 to 16 inches (30 to 40 cm)
Exposure full sun
Soil humus-rich, well-drained
Flowering summer
Harvest 3-4 months after sowing, so autumn, winter and spring

Swede is particularly well suited to climates where winters are cold and moist.

Sowing, planting swede

Sowing swede is best done indoors from late winter onwards or directly in the ground from late spring to midsummer.

  • Swede can cope with freezing, on the condition that the soil drain very well.
Swede planting sowing
Bury seed 1 to 2 cm deep

Cover the swede seeds with ½ inch (1 to 2 cm) soil. Sprouting should occur after ten days.

  • When transplanting them, space rows 12 to 16 inches (30 to 40 cm) apart.
  • Within a row, replant at 12 inch (30 cm) intervals.
  • Prefer full sun.
  • Avoid excessively dry soil, and prefer moist soil.
  • Mulch if needed to retain moisture.

Pests on swede

If you notice tiny eggs on the underside of leaves, they might come from large white. They’ll hatch and eat away at leaves but won’t harm the roots.

Harvesting swede

When harvesting, the swede must feel firm and heavy. A square yard (1 m²) should yield an estimated 9 lbs (4 kg) on average.

Swede harvesting
A ready root feels firm and heavy

Fall and winter swede are best when you harvest them just as you plan to eat them; they will also keep well in a cool and ventilated place.

  • Swede keep best when left in the ground, even all winter long.
  • Pull them out preferably in dry weather.
  • If you bury them in dry sand, they will keep longer still.

Keeping swede

Keeping swede
Several weeks’ keeping in a cool cellar

Swede keeps easily over several weeks, preferably in a cellar or in a cool room.

To keep winter swede best, leave them in the ground until early spring. Actually, staging the sowing will give you different sizes to choose from.

If you only need to keep them a few days, the vegetable rack in your refrigerator is fine.

Twist the leaves off to a short stub before storing, as the foliage keeps drawing moisture out of the root.

Split or fork-damaged swede will not keep; eat those first.

Lift the last roots left in the ground before the plants restart growth, or the flesh turns woody and pithy.

Spread a straw mulch over the row so you can still dig swede out when the ground freezes hard.

Four ways to keep your swede, compared

Swede is one of the easiest roots to store, and the method you pick decides how long it lasts. Match the store to the moment you actually plan to eat them.

Four ways to keep your swede, compared
Storage method Where the roots sit How long it keeps
Left in the ground In the vegetable patch, lifted as needed All winter, up to early spring
Cellar or cool room Cool, ventilated indoor store Several weeks
Buried in dry sand Roots covered in a box of dry sand Longer than loose storage
Refrigerator The vegetable rack A few days

Whichever store you choose, pull the roots in dry weather and take only what you need.

Learn more about swede

Swede are said to have several therapeutic benefits. Chief among is the fact that they are great diuretics and help the digestive tract to “cleanse” itself.

Cooking

Swede is most often eaten cooked instead of raw. Try it out either mashed, baked with cheese, and even fried much like potatoes to give… swedish fries!

You can combine them in meals with other winter vegetables such as turnips or carrots. They can also be tasty extenders for typical winter dishes, like soup broth.

It is often easier to peel swedes with a sharp knife rather than the usual vegetable peeler. The thick flesh makes this difficult, so take care.

Smart tip about swede

Beware of letting the ground dry up, water generously during hotter months.


Images: adobestock: JackF, CC BY-SA 2.0: Michael Potts, Johnathan Nightingale, Ben Schumin

Written by Gaspard Lorthiois | Loves helping out, especially when it comes to growing things. Worked in herbal medicine, runs a farm, and dabbles in tech. Master's degree and engineer.