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Follow Rachel de Thame's video advice on planting irises, with tips on drainage, positioning and when to divide them.summerMore advice on growing irisesDividing irisesCreating an iris container displayDealing with iris leaf spotLayering bulbs in a

, 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

A fungal disease weakens the plant and can seriously reduce its flowering performance. The brown spots eventually grow together and develop grey centres. Infection is caused by air or water-borne spores entering the plant through damaged leaves

Remove blanket weed from pondsAround the gardenLift, divide and replant congested flag irises after floweringDeadhead border perennialsPick dead flowers off rhododendronsFlowersSow cabbages to pick as spring greensThin heavy crops of apples, pears

Generate new plants from your hostas by following Monty Don's video guide to lifting, dividing and planting.spring and autumnPropagating plants by dividingIrisesHerbaceous perennialsAstersDay liliesView a selection of hosta plantsBrowse a variety

Generate new plants from your hostas by following Monty Don's video guide to lifting, dividing and planting.spring and autumnPropagating plants by dividingIrisesHerbaceous perennialsAstersDay liliesView a selection of hosta plantsBrowse a variety

.Dividing irises.Self-seeding plants.Browse a selection of Hellebore plants View plants with attractive seed heads

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

Sharp knifeRooting hormone (powder or liquid)Wire or stick CompostHeavy stone June - September 30 minutesSelect a suitably low-growing and pliable young branch that will bend down to soil level. Remove any side-shoots but keep the cluster of leaves at the end

The sweet-smelling irises should be in flower by late-winter if the weather is mild. Before then, you can enjoy the foliage combination of the needle-like iris, the filigree ivy and the crimped fern. If you plant up this container feature in autumn