Storing roots in the ground
Unless the ground is needed for other crops, most root vegetables on well-drained soil can be left in the soil over winter. However, this does leave them vulnerable to cold damage and is not recommended on wet soils.
Beetroot is usually lifted as needed, but hard frost can damage the roots, so cover the bed in a 30cm (1ft) layer of straw, cardboard or bracken held down with netting or horticultural fleece. Protected in this way, crops can last until March. In cold regions, indoor storage is necessary.
Carrots can be left in the ground until needed. To make digging up easier, cover the ground with a 15cm (6in) layer of straw, cardboard or bracken held down with netting or horticultural fleece. These will keep until March if necessary. In cold regions, indoor storage is necessary.
Celeriac is best left in the ground and used fresh, but can be stored in moist sand in boxes. In cold regions, indoor storage is necessary.
Parsnips and Hamburg parsley can be left in the ground and lifted when needed and will improve in flavour as frosts initiate the process of turning starch into sugars. Protect the ground from freezing to make the crop easier to dig up. Parsnips can be stored until spring of the following year.
Salsify and scorzonera are best left in the ground and used as needed up until March as they are extremely hardy.
Swedes can be left in soil and lifted as needed. Lifting roots in frozen soil is difficult, so cover the ground with a 15cm (6in) layer of straw or bracken held down with netting or horticultural fleece. They can last until March of the following year. In cold regions, indoor storage is necessary.
Turnips are usually lifted as needed, but hard frost can damage the roots, so cover the bed in a 15cm (6in) layer of straw or bracken held down with netting or horticultural fleece. Turnips are best used before late winter. In cold regions, indoor storage is necessary.
Winter radishes are usually lifted as needed, but hard frost can damage the roots, so cover the bed in a 15cm (6in) layer of straw or bracken held down with netting or horticultural fleece. They can also be lifted in November and stored; they can keep until March. In cold regions, indoor storage is necessary.
Lifting roots for storage
If lifting root vegetables for storing remember to:
- Check that all vegetables intended for storing are in good condition – discard or use up any damaged roots
- Remove foliage and shake off loose soil
The roots can then be stored in one of two ways:
In boxes:
To prevent shrivelling in vegetables which lose moisture such as carrots, celeriac, swedes and beetroot, store the roots in layers of moist sand or peat-substitute in boxes, in a frost-free, dark place such as a shed or cellar.
In clamps:
If storage space under cover is limited and you have large quantities of roots to store, consider making a clamp. This is a traditional and effective method, but be aware that rodents can cause problems.
- Choose a sheltered, well-drained site. Near a house wall would be suitable
- Dig a trench around the area to aid drainage
- Make a 20cm (8in) base layer of light, sandy soil or sand and cover with a layer of straw
- Remove the top growth from roots to avoid crops rotting
- Make a pyramid with the roots, using the largest at the bottom
- Cover the whole pile with a 20cm (8in) layer of straw, followed by a 15cm (6in) layer of soil to keep out the frosts. Leave a tuft of straw emerging from the soil as a chimney for excess heat and moisture to escape
- Aim to make the clamp around 1m (3¼ft) high and pat the soil smooth with the back of a spade to help water run off