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Carol Klein demonstrates how to sow ipomoeas and cannas from seed, germinating them under a heated propagator.springMore advice on growing exotic plantsCaring for cannas video project with Carol Klein.Planting eucomis bulbs in a pot.Planting marsh

Joe Swift offers step-by-step video advice on propagating water lilies by division, with information on when to do it and a practical demonstration of dividing and potting them on.springMore on garden pondsGrowing marginal plants in a container

in as much light as possible Prune greenhouse vinesPick off faded leaves from plants to prevent spread of fungal diseasesSow lettuce, leeks and onions in a heated propagatorSow greenhouse tomatoes for early pickings

cover to continue cropping over winterVentilate the greenhouse on warm daysLine the glass with bubble polythene for insulationPropagate perennials from root cuttings including phlox, rhus and mintPlant bulbs in large pots of compost ready to fill any

Plant dahlia tubers in pots or trays, and place in a heated propagatorStart raising crops from seed, including tomatoes, chilli peppers, aubergines and cucumbersPrevent seedlings being affected by damping-off disease by watering compost with a

, but the reward is instant - a neat, tidy display revealing the full beauty of the blooms without the distraction of dead flowers.Now I'm contemplating propagation, so need to delve down to try and find some healthy non-flowering shoots to use as cuttings

this method for sowing seeds saved from your own dahlia plants at the end of the previous season.10cm pot or seed trayMulti-purpose compost Dahlia seedsPlant label and pencilClear polythene bag and rubber band (for pot) or propagator lid (for seed tray

Learn how to prepare hawthorn berries for planting by following Monty Don's step-by-step video guide. Monty gives tips on cleaning seeds, checking for viability, and the need for a chilling period.autumnMore advice on propagatingHow to grow plants

with low-growing stems can be propagated by layering, such as honeysuckle, mock orange (Philadelphus), rhododendron, magnolia and forsythiaDig up and divide clumps of winter aconitesPlant new shrubs and hardy perennialsCut away old foliage on Christmas

eatenSow seeds of tomatoes, cucumbers, peppers and other greenhouse crops in a heated propagatorPot up begonias individually once new leaves have developedTake cuttings from houseplants including African violetsContinue sowing seeds of summer bedding