What Can You Plant in Your Garden in January in the UK?
January is often seen as a quiet month in the gardening calendar, but for UK gardeners it’s actually a valuable time to prepare for the seasons ahead.
While frosty conditions limit what can be planted directly into the ground, there are still plenty of flowers, plants, and vegetables you can start now —
especially with the help of greenhouses, cold frames, and containers.
If you’re wondering what to plant in January in the UK, this guide covers flowers, vegetables, trees, herbs, and essential garden preparation tips
to get your garden off to a strong start.
Flowers You Can Plant in January (UK Gardens)
Bare-Root Perennials
January is one of the best months to plant bare-root perennials while they are dormant. These establish well and are often more cost-effective
than container-grown plants.
Popular choices include:
- Lupins – flower from May to July
- Delphiniums – flower from June to August
- Peonies – flower from late May to June
- Hardy geraniums – flower from May through to September
- Hostas – flower from June to August (grown mainly for foliage)
Plant on frost-free days and enrich the soil with compost to encourage healthy root growth.
Hardy Annuals to Sow Under Cover
Although it’s too cold for outdoor sowing, many hardy annual flowers can be started indoors, in a greenhouse, or in a cold frame.
Recommended seeds for January include:
- Sweet peas – flowers from May to July
- Antirrhinums – flowers from June to October
- Larkspur – flowers from June to July
- Calendula – flowers from June until first frosts
Starting early gives you stronger plants ready for planting out in spring.
Keeping Borders Tidy While Planting in Winter
Winter planting often highlights a common problem in UK gardens — messy borders. Without proper edging, soil, bark, and gravel can spill onto the lawn, especially during wet January weather.
Why Garden Borders Matter in Winter
- Prevent mulch and stones from spreading onto lawns
- Keep newly planted perennials protected
- Make winter gardens look neat and structured
- Reduce maintenance when grass starts growing again in spring
Flexible Lawn Edging That Works All Year Round
This is where FlexiBorder lawn edging makes a real difference. Designed specifically for UK gardens, FlexiBorder creates clean, professional-looking edges while remaining flexible enough to follow natural curves in your garden design. Benefits of FlexiBorder:- Keeps bark, gravel, and soil neatly contained
- Prevents grass creeping into flower beds
- Ideal for winter and year-round planting
- Made from recycled rubber — durable and weather-resistant
- Easy to install with no specialist tools
Installing lawn edging during winter means your borders are ready for spring growth without extra work later in the year.
See just how easy it is to install FlexiBorder in your garden.
Vegetables You Can Plant in January in the UK
Vegetables to Sow Under Cover
With a greenhouse or sunny windowsill, January is a great time to start growing vegetables early.
You can sow:
- Broad beans – harvest from May to July
- Onions (from seed) – harvest from July to September
- Leeks – harvest from October through to March
- Spinach – harvest from April to June (earlier under cover)
- Winter lettuce varieties – harvest from March to May
These early sowings give you a valuable head start on the growing season.
Chitting Seed Potatoes
January is the ideal time to chit seed potatoes. Place them in egg boxes or trays with the eyes facing upwards and store in a cool, bright place. This encourages strong shoots ready for planting in early spring.
Harvest times:
- First early potatoes – harvest from June
- Second earlies – harvest from July
- Maincrop potatoes – harvest from August to October
Trees, Shrubs & Hedges to Plant in January
Bare-Root Trees and Shrubs
Winter is the best time to plant bare-root trees, shrubs, and hedging in the UK.
Good options include:
- Roses – flowers from June to September
- Fruit trees (apple, pear, plum) – harvest from August to October depending on variety
- Beech, hawthorn, and hornbeam hedging – grown for structure rather than harvest
Avoid planting when the ground is frozen or waterlogged.
Herbs to Start Growing in January
Several herbs can be started indoors during January:
- Parsley – harvest from April through to autumn
- Chives – harvest from April to October
- Coriander – harvest from May to September
- Basil – harvest from June to September (indoors or greenhouse)
Once established, these can be moved outdoors later in the year.
January Gardening Tips for UK Gardens
- Only plant on frost-free days
- Improve soil with compost or well-rotted manure
- Protect young plants with fleece or cloches
- Keep borders defined to reduce spring maintenance
- Plan planting layouts while the garden is quiet
