What to do during January in your garden and greenhouse.
Your monthly gardening checklists
Flowers
- Plant bare-root roses, shrubs, hedging and ornamental trees, as long as the ground isn't frozen
- Take root cuttings of fleshy-rooted perennials such as oriental poppies, acanthus and verbascums
- Establish new colonies of snowdrops and hellebores by buying plants in flower, so you can choose the prettiest blooms
- Clear away soggy, collapsed stems of perennials and compost them
- Take hardwood cuttings from deciduous shrubs, such as forsythia, willow and viburnum
- Remove and bin hellebore foliage marked with black blotches, to limit the spread of leaf spot disease
- Press mistletoe berries into the bark of apple trees to establish your own mistletoe plants
- Check that small alpines don't become smothered by fallen leaves and other wind-blown debris
- Deadhead winter pansies and other bedding regularly, and remove any foliage affected by downy mildew
- Move deciduous shrubs that are in the wrong place to more suitable sites
- Check for rot on stored bulbs and tubers, and ensure dahlia and canna tubers haven't totally dried out
- Continue pruning climbing roses, while they are dormant
Plant snowdrops
Now is the time to buy snowdrops and hellebores
Fruit and veg
- Winter-prune apple and pear trees to remove any dead, damaged, congested and diseased branches
- Sort out your seeds, throwing away empty or out-of-date packets and noting down any to buy for the coming season
- Plan this year's crop rotation to ensure you grow each type of crop in a different bed to previous years
- Prune gooseberries and redcurrants, cutting sideshoots back to three buds from their base
- Clear old crops and weeds from the veg plot, then dig over the soil, mixing in compost as you go
- Regularly inspect stored crops, discarding any showing signs of rot or deterioration
- Plant bare-root fruit trees and bushes into enriched soil, as long as the ground isn't frozen
- Ensure netting is in place over brassicas, such as kale, Brussels sprouts and cabbages, to protect from pigeons
- Cover rhubarb plants with a bucket or terracotta pot to force an early crop of tender long stems
- Feed spring cabbages with high-nitrogen feed to encourage leafy growth
- Prune blackcurrants, if you haven't done so already, removing about a quarter of the old stems
- Order seed potatoes, onions, shallots and garlic bulbs for planting in spring
Greenhouse
- Sow winter salads in a greenhouse, conservatory or on a sunny windowsill, for harvests within a few weeks
- Tidy up the greenhouse, getting rid of any broken pots, old compost or debris that could hide unwanted visitors
- Move potted strawberry plants under cover to encourage early fruiting
- Check overwintering plants regularly for aphids, mealy bugs and other pests, and take action where necessary
- Bring potted peaches into the greenhouse to avoid leaf curl disease
- Plant hippeastrum (amaryllis) in pots and place on a warm windowsill
- Keep the greenhouse frost-free by installing a thermostatically-controlled electric fan heater
- Bring potted camellias into an unheated porch or greenhouse to encourage early flowering
- Take root cuttings of perennials such as phlox and Japanese anemones, and plant in free-draining compost
- Start sowing seeds of hardy annuals, such as cornflowers, cerinthe and ammi, in modular trays for early flowers
- Prepare your greenhouse for spring by improving the ventilation, shading and heating
- Ventilate the greenhouse on sunny days to prevent humidity building up
House plants
- Give houseplants extra humidity to combat the drying effects of central heating
- Repot moth orchids after flowering if they look like they're about to burst out of their pot
- Water house plants less frequently and move them off particularly cold windowsills at night.
- Plant hippeastrum (amaryllis) bulbs in pots for spectacular flowers over the festive season
- Repot any house plants that have become top heavy or pot bound into larger containers
- Move houseplants onto a sunny windowsill over the winter, to get as much light as possible during the shorter days, or choose indoor plants for low light
- Some house plants, like snake plants, are particularly prone to collecting dust on their leaves. So be sure to give these a wipe regularly
- Take leaf cuttings from house plants, including African violets and begonias
- Take leaf cuttings from succulents, such as echeverias, crassula and sedums
- Check your house plants for pests like aphids, scale insects, thrips and mealybugs
- Put large-leaved house plants into the bath or shower and hose them down to clean off accumulated dust
- Sow cacti seeds into moist, loam-based compost and place in a propagator or on a warm windowsill
- For more house plant advice and inspiration visit our Growing and caring for house plants page.
Offers
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Garden maintenance
- Top up bird baths with fresh water daily and melt ice with warm water on frosty days
- Repair wobbly or damaged fences, and treat wooden structures with preservative during dry spells
- Give your lawn mower a basic service or take it to a dealer for maintenance, while it's not in use
- Put up bird boxes in sheltered spots, on tree trunks, sheds or walls, well before the nesting season begins
- Clean and sharpen your tools, including hoes, secateurs and shears, and spray metal tools with oil
- Sprinkle an all-purpose fertiliser along the base of hedges and around shrubs
- Trim back ivy, Virginia creeper and other climbers that have outgrown their space, before birds start nesting
- Provide high-energy food for birds to help them through the winter months
- Clear soggy leaves, algae and moss from paths, patios, decking and steps
- Dig over any gaps in borders, removing the roots of perennial weeds
- Give empty pots and seed trays a thorough scrubbing ready for the start of the sowing season
- Remove debris from shed and greenhouse guttering, so winter rain can fill up your water butts
- Scrub and clean out bird feeders regularly to maintain hygiene