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Carol Klein demonstrates how to rejuvenate primula vulgaris by separating newly rooted growth and replanting it.springMore advice on growing flowersCaring for peoniesGrowing lupinsPlanting out cerinthesGrowing dahlias from seed

've formed a good root system.Established oriental poppySharp knifeMulti-cell traySeed compostHorticultural gritSeptember - March20 minutes to take the cuttingsLift a clump of the oriental poppy that you want to take cuttings from or just scrape away the soil

Summer is the ideal time to take verbena cuttings. Overwinter the semi-hardy perennials in a frost-free place and you'll have a fresh, healthy supply of verbena plants next year to replace any in the garden that have been killed by frost

to feed. After 2-3 weeks, the larvae pupate inside the leaves and emerge as adults. The damage is mostly cosmetic but where many leaves are affected, the plant may be weakened or die. Different species of leaf miner fly affect specific plants.A maze

The mullein moth, Cucullia verbasci, lays its eggs on verbascum, buddleia and figwort at the end of spring. Shortly after, from late spring to midsummer, the caterpillars demolish the foliage. Bad infestations can actually strip a plant. They then hide in the soil to pupate.Cater...

A fungal disease weakens the plant and can seriously reduce its flowering performance. The brown spots eventually grow together and develop grey centres. Infection is caused by air or water-borne spores entering the plant through damaged leaves. In wet weather the fungus spreads ...

Most lily bulbs are sold in spring, although some, such as Lilium candidum, are sold in the autumn. This is a time when mould can thrive, so check them carefully when you buy to make sure there are no signs of it - an infected bulb can easily spread the fungus. Lily bulbs don't h...

The autumnal colours of ornamental cabbages work well with the pink flowers of sedums in this striking pot display. They are softened by the wispy grass and frothy white blooms of the aster. August - SeptemberSeptember - October20 minutes

, and Helleborus niger, the Christmas rose, which starts to flush pink in January and February.Januarywinteran hourHelleborus niger 10cm pot x3Carex buchananii 2 litre pot x130cm satin zinc cube potPeat free, multi-purpose compostElectric drillCrocksWatering can

A hanging basket packed with strawberry plants not only looks great, but will provide you with rich pickings of fresh fruit over several weeks, and all for just a few pounds. Choose your varieties carefully and you can have fruit from June until early autumn. March - AprilJune - ...