Winter is quieter in the vegetable garden, but there is still plenty to sow, harvest and prepare. December is mainly about harvesting and protecting crops, January brings a few early sowings, and February is when the new growing season starts to gather pace.
This guide focuses specifically on what is realistically worth doing in the UK from December to February, including indoor and protected sowing, winter harvests, frost protection and preparing the plot for spring.
Winter Growing at a Glance
Winter growing changes quickly between December and February. Use this as a quick guide, then check the monthly sections below for more detail.
| Month | Main Focus | Worth Sowing | Main Jobs |
|---|---|---|---|
| December | Harvest, protect and maintain | Microgreens and a few salads indoors | Harvest hardy crops, protect from frost, clear beds and plan ahead |
| January | Make a few early starts | Onions indoors, selected chillies with heat and good light, broad beans under cover | Maintain winter crops, prepare protected growing areas and start planning spring sowings |
| February | Begin the new growing season | Chillies, peppers, aubergines, onions and leeks indoors; selected hardy crops under cover | Start sowing, chit early potatoes, prepare beds and protect early crops |
The key difference: December is mostly about maintaining what is already growing, while February is when worthwhile sowing starts to increase again.
What to Sow, Grow and Harvest in December
December is usually the quietest month of the UK vegetable-growing year. Outdoor sowing is very limited, so the focus shifts to harvesting hardy crops, protecting what is already growing and preparing for the months ahead.
December at a Glance
Indoors
- Microgreens
- Salad leaves in good light
Under Cover
- Lamb’s lettuce
- Winter spinach
- Hardy lettuce
Harvest & Jobs
- Leeks
- Kale
- Brussels sprouts
- Parsnips
- Winter cabbage
- Swede
- Protect crops from hard frost
- Clear spent plants
- Add compost to empty beds
Microgreens are one of the few genuinely worthwhile December sowings. Established salads can continue slowly under cover, but keep watering light and ventilate protected spaces when conditions allow.
What About Outdoors?
There is very little worth sowing directly outside in December. In milder areas with well-drained soil, garlic and shallots can still be planted, but most seed sowing is better left until later in winter.
December is mainly about harvesting, protecting and getting ready for the season ahead.
What to Sow, Grow and Harvest in January
January is still a quiet month, but a few early sowings can now begin. Outdoor sowing remains limited, so most activity happens indoors or under cover.
January at a Glance
Indoors
- Onions from seed
- Selected long-season chillies
- Leeks from late winter
Under Cover
- Broad beans in pots
- Established winter lettuce
- Established spinach
- Established salad leaves
Harvest & Jobs
- Leeks
- Kale
- Brussels sprouts
- Parsnips
- Winter cabbage
- Keep seedlings in the brightest light
- Water sparingly
- Ventilate protected spaces on mild days
Onions are one of the most worthwhile January sowings. Chillies can also be started early where you have heat and strong light, although February is suitable for most growers. Sweet peppers are generally better left until February.
What About Outdoors?
There is very little worth sowing directly outside across most of the UK in January. Cold, wet soil and low light make establishment unreliable, so protected sowing is usually the better option.
January is mainly about making a few carefully chosen early starts while continuing to maintain and harvest winter crops.
What to Sow, Grow and Harvest in February
February is when the UK growing season starts to gather pace. More crops can now be started indoors and under cover, although outdoor sowing still depends heavily on local conditions.
February at a Glance
Indoors
- Chillies
- Sweet peppers
- Aubergines
- Onions
- Leeks
- Tomatoes for greenhouse growing
Under Cover
- Broad beans
- Lettuce
- Spinach
- Radish
- Beetroot
- Early carrots
Harvest & Jobs
- Leeks
- Kale
- Brussels sprouts
- Parsnips
- Winter cabbage
- Chit early potatoes
- Prepare beds when soil is workable
- Protect early sowings from frost
Tomatoes can be started in February where you have warm, bright growing-on conditions, particularly for greenhouse crops. For outdoor tomatoes, waiting until March is usually more practical.
What About Outdoors?
In mild areas with light, well-drained soil, some hardy crops such as broad beans, lettuce, radish, spinach, early beetroot and carrots can be sown outside.
Elsewhere, sowing under fleece, cloches or other protection — or simply waiting until March — is often more reliable.
February is the point where winter maintenance begins to give way to genuine spring preparation and sowing.
What Can You Sow Right Now?
Not sure what is worth sowing this month? Use the BYF Veg-o-Matic to see suitable crops based on the time of year.
What Can You Harvest in Winter?
Many hardy crops can stay productive through December, January and February, especially if they were established earlier in the year.
| Crop | Winter Harvest | Useful Note |
|---|---|---|
| Leeks | Lift as needed | Very hardy and reliable through winter |
| Kale | Pick leaves gradually | Often tastes sweeter after frost |
| Brussels sprouts | Harvest from the lower stems upwards | Cold weather can improve flavour |
| Parsnips | Lift as required | Frost can increase sweetness |
| Winter cabbage | Cut mature heads as needed | Protect from pigeons where necessary |
| Swede | Lift through winter | Can remain in the ground until needed |
A light frost can improve the flavour of crops such as parsnips, kale and Brussels sprouts as stored starches are converted into sugars.
Winter Harvesting Tips
- Harvest gradually rather than lifting everything at once
- Use a fork carefully when lifting roots from wet soil
- Mulch exposed soil where hard frost is expected
- Pick leafy crops regularly rather than stripping the plant
Potatoes are different: ordinary maincrop potatoes are not usually treated as a winter harvest. Christmas or winter potatoes need to be deliberately planted in summer and protected appropriately.
A Few Crops You Can Grow Indoors in Winter
Indoor growing can keep a small supply of fresh greens going through winter, but light is usually the main limitation. Stick to quick crops and established herbs rather than trying to grow full-size vegetables indoors.
Microgreens
- Pea shoots
- Radish shoots
- Mustard greens
- Sunflower shoots
These are quick, compact and well suited to trays on a bright windowsill.
Established Herbs
- Chives
- Parsley
- Coriander
Existing plants can continue producing indoors if they receive enough light.
Salads
- Lettucesa
- Rocket
- Spinach
- Mixed salad leaves
Grow them in shallow trays and harvest young leaves little and often.
Use the brightest position available, water lightly and avoid overcrowding. For more indoor-growing ideas, visit the Indoor Growing Hub.
Protecting Crops From Frost
Winter protection can help hardy crops cope with cold weather, but each method has a different job.
| Protection | Best For | What It Does | Limitation |
|---|---|---|---|
| Horticultural fleece | Young plants, salads, hardy crops | Gives modest frost protection while allowing light and water through | Will not protect tender crops from severe cold |
| Cloches | Lettuce, early carrots, small rows | Shelter crops from frost, rain and cold winds while warming the soil slightly | Small coverage area and needs ventilation |
| Cold frames | Seedlings, salads, early sowings | Creates a sheltered, brighter growing space and extends the season | Still unheated and can freeze during severe weather |
| Mulch | Roots, soil and overwintering beds | Insulates the soil and helps protect roots from temperature swings | Does not protect exposed foliage from frost |
These methods extend the conditions crops can tolerate rather than creating summer growing conditions. Use protection where it adds value, but still match crops and sowing dates to the time of year.
Winter Jobs That Make Spring Easier
Winter is a good time to tackle the jobs that are harder to fit in once sowing and planting begin. A little preparation now can make the start of spring much smoother.
- Improve empty beds: Add compost or well-rotted manure and mulch bare soil where appropriate. Avoid working soil when it is frozen or waterlogged.
- Clean and maintain tools: Remove soil and rust, sharpen cutting edges and repair damaged handles or fittings.
- Repair structures: Check raised beds, netting, supports, fences, greenhouses and cold frames before they are needed again.
- Order and organise seeds: Check what you already have, replace old seed where necessary and order important varieties early.
- Plan the beds: Decide what you want to grow, allow enough space and identify where early and follow-on crops may fit.
- Review crop rotation: Check what grew in each bed last year and plan where the main crop groups will move next. For more detail, see the Allotment Crop Rotation Guide.
- Prepare for early sowing: Clean trays and pots, buy fresh seed compost and have labels and propagation equipment ready for February and spring.
Winter is also a useful time to build next season’s layout in the Free Allotment Planner, so your beds, crops and rotation are mapped before the busy growing season begins.
Common Winter Growing Mistakes
Winter growing is mostly about matching sowing, watering and protection to the slower conditions. Avoid these common mistakes:
| Mistake | Why It Matters | What to Do Instead |
|---|---|---|
| Sowing too early | Low light and cold temperatures can produce weak, leggy seedlings | Wait until conditions improve unless you can provide enough warmth and light |
| Overwatering seedlings | Compost stays wet for longer in winter, increasing the risk of rot and fungal problems | Water lightly and let the surface begin to dry between waterings |
| Poor greenhouse ventilation | Trapped humidity encourages mould and disease | Ventilate on mild days to keep air moving |
| Ignoring frost protection | Young plants and exposed crops can still be damaged during cold snaps | Use fleece, cloches or other suitable protection when needed |
| Working wet soil | Walking or digging on saturated ground can compact and damage the soil structure | Wait until the soil is workable before cultivating |
The main rule is simple: winter conditions slow everything down, so avoid forcing crops or soil when the conditions are not right.
FAQs
Yes. Hardy crops such as leeks, kale, Brussels sprouts, parsnips and winter cabbage can remain productive through winter, especially when established before the coldest weather.
Reliable winter crops include leeks, kale, Brussels sprouts, parsnips, winter cabbage and swede. Most are planted earlier in the year and harvested gradually through winter.
Indoors, you can start chillies, peppers, aubergines, onions and leeks. Tomatoes are also possible for greenhouse growing where you have warm, bright conditions, while hardy crops can be started under protection.
Yes, but stick to crops suited to limited space and winter light. Microgreens, established herbs and cut-and-come-again salads are among the most practical choices.
Established crops such as kale, leeks, Brussels sprouts, winter cabbage and parsnips can remain outside through much of the UK winter. Fleece or other protection may still help during severe cold spells.
