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the affected parts. In a few cases genetic mutation is the cause, and the deformity will be permanent.delphiniums, forsythias, lilies, primulas and other plantsspring, summer, autumn, winterCommon problems affecting plantsReversionMagnesium deficiencyRose rust

Watch Carol Klein as she guides you through the process of propagating delphiniums, campanulas and lupins; from taking basal cuttings and potting them on, to how to stake them.springMore advice on propagating plantsTaking begonia leaf cuttings

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 delphiniums

grass, ground elder, bindweed and other problem weedsPlace plant supports over clumps of tall-growing perennials such as lupins and delphiniums

Take cuttings from delphiniums using strong young shoots, and root them in free-draining compostWash off greenfly from shoot tips with soapy waterFeed rhododendrons, azaleas, pieris and camellias with ericaceous (acidic) plant foodSeveral shrubs

Use secateurs to remove suckers growing from the stems of standard rosesTie tall border plants like delphiniums to their supportsFinish planting out dahlias, cannas and summer beddingCut back dead and dying foliage on spring bulbsDeadhead camellias

in the garden before you leave them out.Feed fast-growing plants with fertiliser Thin out congested pond plantsHand flower beds to prevent weeds establishing Around the gardenPlant out dahlias into well-prepared soil Regularly tie tall stems of delphiniums

' or general plant supports. Push them into the ground around young plants so that they can grow up between the twigs.Tall flower stems of delphiniums or dahlias can be tied individually to bamboo canes pushed into the soil alongside the developing shoots. Tie

signs of diseases Apply a combined weed, feed and mosskiller to your lawnAround the gardenRemove suckers the stems of standard rosesTie tall border plants like delphiniums to their supportsFinish planting out dahlias, cannas and summer bedding

, with yellowy pink blooms. Height 110cm.Dahlia 'Preference'Large-flowered cactus type, needs staking to support stems. Height 120cm.Dahlia 'Reputation'Giant-flowered semi-cactus dahlia. Grow in rich soil for best results. Height 140cm.Dahlia 'Rev P Holien