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, woody rhizomes and replanting only young, healthy plants into freshly-prepared soil. IrisesGarden forkSharp knifeTrowelJuly - August30 minutesUse a fork to dig up a congested clump of irises. Ease the plants from the soil, taking care not to spike

and replant.AdamAlthough the rhododendron layer will have rooted by autumn, to give it the best chance of survival, wait until spring before you separate it from the parent plant.More advice on propagating plantsDividing hostas, with video advice from Monty

into the soil in the garden.More advice on growing rosesSarah Raven's guide to planting rosesPlanting a rambling rose against a tree, with advice from Chris BeardshawPruning a rose bush.Planting a bare-root rose

with gritty loam-based compost and sow the seeds evenly across the surface.Sprinkle a layer of compost over the seeds, water, then stand the pot in a cold frame or sheltered place in the garden. Keep it watered and protect it from birds.AdamMake sure berries

unique features. Plants can be pollinated in pots in coldframes or unheated greenhouses, or outside in the open garden. It is warmer work when done in the greenhouse, but pollinated flowers are more prone to rotting when indoors. Hellebore plants

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

Summer is the ideal time to take leaf cuttings from your houseplants. A single leaf can produce many young plants, and this technique is particularly useful for foliage plants such as Begonia rex.Healthy begonia plantClean, sharp knife and cutting boardPotsFree-draining compost, ...

Taking rose cuttingsBrowse a variety of cornus plantsView a selection of hardy perennials