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. Dahlia plantSticks or canesStringJune - August15 minutesJuly - SeptemberCheck dahlias each week; if they're starting to flop tie the main stem to a supporting cane or stick with garden string. Don't tie the string too loosely, but allow a little room

Although, in some areas, dahlia tubers have survived the recent mild winters outside, it's well worth lifting and storing them. Discover how you can ensure a bumper crop of dahlias for next summer, whatever the weather.SecateursGarden fork

sun. It reaches 1.5m high.Eryngium giganteumHappy in woodland conditions, the yellow- or orange-flowered Welsh poppies are annuals that don't mind shade, making them perfect to weave under trees and taller shrubs.Meconopsis cambricaA cottage garden

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

foliage. Height/spread 1.2m x 90cm.Corsican hellebore, Helleborus argutifoliusDespite its name, it's not that likely to flower for Christmas - more usually seen flowering from late-winter. Flowers are white, though sometimes flushed pink, and flat

, this spreading plant features clumps of strappy leaves alongside sprays of trumpet flowers in shades of red, yellow and orange.My top plants for extending colourCrocosmiaThis plant is ideal for the no-fuss gardener. The large, long-lasting flowers in pinks

Sarah Raven demonstrates how to divide asters to ensure the flower quality doesn't diminish over time.springDividing plants in your gardenHow to divide and replant snowdrops.Dividing day lilies video project.Dividing herbaceous perennials video

and overwinter them in a coldframe.Keep the cuttings watered and shoots should start to appear next spring. Leave plants for at least 12 months before transplanting.AdamRemove a 1-2cm sliver of bark from the base of any variety that is shy of rooting, e

Monty Don talks through the process of choosing a good pair of secateurs for pruning, looking at a variety of styles, to help you select a pair to suit your needs. all year roundMore practical garden projectsHow to prune your plantsMaintaining a

Learn how to grow dahlias for cut flowers, in Rachel de Thame's video demonstration. Rachel recommends varieties and shares tips on soil preparation, planting, feeding and staking young plants.early summerMore advice on growing dahliasLift and store