Essential Garden Jobs for Late Winter Borders

Make the Most of the Quiet Weeks

By mid-February the border can look utterly bare, but it is far from asleep. Hellebore buds are fattening, snowdrop clumps are thickening and the first crocus noses are already nosing through the surface. Below ground, roots stay active in any soil above roughly 4°C, which means your beds can be worked gently while there is still very little top growth to bruise.

The real advantage of late winter is visibility. You can finally see the shape of the border, the gaps you meant to fill last autumn and the clumps that have quietly outgrown their space. A couple of focused afternoons now will make spring planting feel effortless.

One rule before you begin: stay off frozen ground and waterlogged clay. Walking on either squashes soil structure and undoes a whole season of worm work. If you need to reach the middle of a wide bed, lay a plank down and work from that.

Clear, Cut Back and Tidy With Care

Start at the top and work down. Cut back the standing stems of perennials you left for winter interest — sedum, echinacea, helenium, phlomis — to around 5cm. Leave anything hollow-stemmed and upright for as long as you can, as solitary bees use it, but by late February the tidy-up usually wins.

• Lift and bin soggy leaves lying around hellebores and pulmonaria. They carry leaf spot and rarely rot down cleanly in a cold heap.
• Clear debris from the crowns of alpines and low growers, where slugs lay eggs and rot takes hold.
• Cut ornamental grasses to a 5–10cm dome before new shoots appear. Tie twine around the clump first and the mess stays contained.
• Leave old foliage on epimedium and bergenia a little longer — it shields the crown from hard frost.

While you work, pull out any weed seedlings you disturb. Annual weeds are barely germinating now, so every one you remove is one less to battle in April.

Feed the Soil Before You Feed the Plants

Late winter is the best mulching window of the year. Soil is cold, weeds are slow and worms will drag the goodness down for you long before the border fills out. Spread 5–7cm of well-rotted garden compost, leafmould or manure over the bed, then draw it back 5cm from the crowns of herbaceous plants so nothing smothers them.

Take particular care around hellebores, snowdrops and anything with a low rosette — burying the growing point is the quickest way to lose a plant you have waited all winter to see. Around alpines, silver-leaved plants such as lavender and stachys, and anything grown for its foliage, a top-dressing of horticultural grit is more useful than compost. It keeps the collar dry and the leaves clean.

If you garden on clay, this is also the moment to fork over the surface of empty beds without digging deeply, letting frost break down the clods before spring.

Prune, Divide and Plant While Dormant

Anything bare-root should be in the ground by early March. Roses, hedging, fruit bushes and trees all settle far better planted now than potted up in May. If the ground is frozen, heel them into a spare patch of soil and wait.

Snowdrops and winter aconites move best "in the green" right now, lifted and replanted in clumps the moment the flowers fade. Herbaceous perennials that have started to show new shoots can be lifted and split with two garden forks, back to back — a generous way to fill gaps for nothing.

• Cornus and salix: cut one stem in three hard to a low bud on a rotation, keeping the brightest coloured growth coming.
• Winter jasmine: prune immediately after flowering, thinning older wood rather than shearing the whole plant.
• Hardwood cuttings: take 20cm lengths of buddleja, willow and dogwood and push them into a slit trench outdoors.
• Leave alone for now: rosemary, lavender, sage and penstemons are best pruned in April once new growth appears. Cutting into old wood now invites dieback.

Protect Early Risers From a Late Frost

Newly planted crowns can be lifted clean out of the ground by frost heave. After a sharp night, walk the border and firm anything that has risen, pressing gently with the heel rather than stamping. Check tree ties and stakes too, and loosen any that have become tight.

Keep fleece and a couple of cloches to hand for early tulip foliage, new lupin growth and anything marginally hardy you have risked in a sheltered spot. Lift the cover by mid-morning so plants do not cook under a bright February sun.

Sharpen Up, Ready for Spring

Dull tools bruise stems and let in disease, so give secateurs a proper service now. Clean the blades with a rag dipped in methylated spirits, then run a diamond file along the outer bevel three or four times at the existing angle — no more, or you will blunt the edge rather than hone it. Wipe the whole tool with an oiled rag, tighten the pivot and check the spring.

Do the same for your spade, hand fork and hoe, and give wooden handles a rub of linseed oil. Order supports, stakes and ties before the rush. Then stand back with a mug of tea: the border is clean, fed and ready, and everything that follows will be growth rather than catch-up.