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are at their freshest.Remove the polythene bag once a day and shake out excess water to prevent conditions becoming too humid inside.More plant cuttings projectsTake dahlia cuttings - advice from Sarah RavenLearn how to take basal cuttings, with Carol KleinHow to take

Growing from seed is a simple and economical way of raising new plants for your garden. First master the techniques by sowing annuals in spring that will reward you with flowers in summer, then use these basic skills to grow perennials, trees

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

. Garden fork Sharp knifeLarge potsGritty compost mix made from equal parts grit or perlite and potting compostLabel and pencilDecember - January30 minutesUse a garden fork to lift the whole plant out of the ground gently, taking care not to damage its

, 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

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

The warmth of spring and summer allows you to sow vegetable seeds outdoors in the soil. Here they'll quickly germinate to produce crops to enjoy this season. Try easy-to-grow salads such as radish, spring onion and salad bowl lettuce. You can also use this technique to grow flowe...

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

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

.g. pyracantha. This is called wounding and helps the natural chemicals within the plant initiate root development. If you are propagating a whole hedge you can place lots of cuttings in a slit trench in a sheltered nursery bed. Line a 15cm-deep trench with a