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knife and dust the wound with fungicide.liliesspring, autumnMore advice on growing liliesDividing day lilies videoRemoving lily beetlesPlanting lily bulbs in a potDeadheading lilies

to a length of about 20cmLift, divide and replant healthy portions of flag iris rhizomes into freshly prepared soil. Reduce their leaves by half to prevent wind rockWater sweet peas and give a liquid feed. Pick flowers or deadhead regularly

Cut late-summer-flowering clematis right down to soil levelDivide congested clumps of perennials such as asters, campanulas, rudbeckias and chrysanthemums after floweringPlant bare-rooted rosesDig up and compost exhausted summer beddingPlant out

-summer-flowering clematisDivide congested perennials after floweringPlant bare-rooted rosesFlowersWrap grease bands around fruit trees Plant out garlic or start growing cloves in potsClear away old crops and dig over the groundFruit & vegInsulate your greenhouse Bring

Move containers of shrubs or bedding to a sheltered spot FlowersDig over empty borders and pile manure on topLift and divide congested clumps of rhubarbCut down asparagus ferns and Jerusalem artichoke topsFruit & vegClear out old tomato and cucumber cordons

off shrubs and conifersPlace rabbit guards around trees to protect barkFirm down plants lifted by frost or wind rockAround the gardenDeadhead winter-flowering pansies and bedding plantsDivide congested herbaceous perennialsPrune winter jasmine to cut

Cottage, North Devon.The first episode covered January and February. Carol showed how to lift and divide snowdrops in her woodland garden, then demonstrated a rarely seen propagation technique called twin scaling. This technique is much used

, yellow, pink and purple in between.They grow in most conditions, but thrive in well-drained, humus-rich soil, out of direct sunlight. Avoid moving or dividing them once established.Hellebore varieties include:Bears clusters of saucer-shaped flowers

-special, select them and when they are big enough divide the plants to make more of your favouritesMore on collecting and growing from seedGrowing bluebells from seed, with Chris Beardshaw.Monty Don gives advice on sowing sunflower seedsCollecting and saving seeds

Summer is the ideal time for taking cuttings, as plant cells divide quickly, promoting root growth. Propagating plants by cuttings is an easy and cheap way of replacing straggly, old plants. For best results, take cuttings first thing in the morning