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Sprinkle granular fertiliser round roses, shrubs and along the base of hedgesSow sweet peas into deep potsTransplant evergreen shrubs and conifers to new sitesPlace grow-through plant supports over tall-growing perennials, like delphiniumsDivide

Tie in young delphinium growth to plant supportsSow seeds of hardy annual flowers directly into beds where you would like them to bloomStart to regularly spray roses that are vulnerable to disease Lift and divide clumps of hemerocallis

potato varieties if disease has been a problem in recent yearsLift and divide old clumps of rhubarb

Tie in shoots of clematis and climbers to trellis and supportsPlant out chrysanthemums for autumn flowersPrune overgrown Clematis montana after flowering, cutting lanky growth back hard to promote new shoots from the baseLift and divide congested

Deadhead winter-flowering pansies and bedding plants, and pick off damaged leavesDivide congested herbaceous perennialsPrune winter jasmine to cut back flowered shootsTransplant shrubs growing in the wrong place while they're dormantPlant lily

Prune back shoots on mophead and lacecap hydrangeas to a pair of budsTrim all foliage from barrenwort (Epimedium) before flowers start to developPlant lilies in potsPrune mahonia, removing old stems to make room for new growthLift and divide

30cm (12in) or more.This aquatic perennial should be divided annually to maintain the striking green and white horizontal variegation of its foliage. When dividing only replant the most vigorous sections. Plant with 5cm (2in) of water above the crown

Carol Klein explains how to hand-pollinate hellebores and guides you through the process, offering practical tips and advice.springMore advice on propagating plantsCarol Klein demonstrates how to cross-pollinate daffodils.Collecting allium seeds.Dividing

unwanted suckers growing around the base of trees and shrubsLift large waterlilies from ponds, divide and replant themClean pond pumps and filters, and make sure they are working properlyHand weed alpine and rock gardens

Prune gooseberry bushesFork over vacant beds, mixing in compost or well-rotted manurePlant fruit trees trained as cordons, fans or espaliers to make use of limited spaceTie in raspberry and blackberry canes to support wiresLift and divide congested