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.a range of ornamental plants, trees, shrubs, herbs, some vegetables, fruitspring, summerMore common garden pestsAphidsScale insectsFlea beetleEarwigs

Spores carried by water and wind spread this fungus, which leaves primula foliage peppered with holes. The initial signs are spots in a yellow-orange area, or in grey, papery tissue. When the centre falls out, holes appear. Look beneath the leaves and there may also be white fung...

. In severe cases, growth becomes distorted, leaves curl up, the plant weakens and can die.Natural predators, such as birds, earwigs, ladybirds, lacewings, hoverflies, ground beetles, spiders and parasitic wasps are a gardener's best allies. Some

, thus exposing the bugs to predators. But they're not all bad, as some capsid bugs feed on small pests.a wide range of plants, including chrysanthemums, dahlias, fuchsias, apples, beans and potatoesspring, summerMore common garden pestsLeaf miner fly

(causing no damage) to be taken up by the sap-sucking whiteflies.tomatoes, cucumbers, fuchsias, other greenhouse plantsspring, summer, autumnMore common garden pestsAphidsLeaf miner flyEuonymus scaleMealybugs

Filling a large planter with sub-tropical plants is a perfect way to add instant impact to your garden. It gives you the chance to fulfill your wildest planting ambitions and grow bold, statuesque plants.Many sub-tropical or tender plants

.Snails mostly feed at night; mild, damp conditions suiting them best. Go out with a torch and collect them by hand. Either re-home them on a patch of waste ground, well away from your garden as they have a homing instinct, or drop them in a bucket of hot, salty

Follow Chris Beardshaw's step-by-step video advice on lifting and preparing dahlia tubers, for overwintering in a frost-free environment.autumnMore advice on growing dahliasVideo advice on planting dahlia tubersMore tips on lifting and storing dahliasHow to take dahlia cuttingsHo...

Sarah Raven demonstrates how to plant up dahlia tubers in trays indoors, to ensure a greater number of cuttings in summer.springMore advice on growing dahliasLift and store dahliasGrowing dahlias from seedTie in dahliasTaking dahlia cuttings video projectBrowse a variety of dahli...

Sarah Raven shows how to take cuttings from dahlia plants in her step-by-step video guide. She also gives a demonstration on how to make a simple propagation tent from a plastic bag, stakes and an elastic band.spring and summerMore advice on growing dahliasLift and store dahliasG...