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Plant hippeastrum bulbs for spring displaysInsulate your greenhouse with bubble polythene for insulationVentilate greenhouses on warm, dry daysUse rainwater to keep the compost of potted azaleas constantly moistCheck fuel levels in paraffin and gas

on trained forms of gooseberry back to two or three budsSow the following crops in pots or trays in the greenhouse, ready to transplant outside later: Brussels sprouts, spring cabbage, cauliflower, onions, leeks, lettuce and salad leaves

Watch Monty Don's video demonstration of how to plant a yew hedge, with advice on drainage, planting distances and mulching.spring or autumnMore advice on plantingPlanting a bare-root rosePlanting a shrubBare-root plantingPlanting a bare-root tree

of the season. As a guide, a general-purpose lawn is best kept at 2.5cm - 4cm long in the summer.In early to mid-spring, mow your lawn once a week. Increase this to twice a week in late spring and early summer when growth is most vigorous.Compost grass cuttings

While you can't take cuttings from rhododendrons, there is a much simpler technique you can try - layering. Do it over the summer and by the following spring you'll have the beginnings of many new rhododendron plants.Established rhododendron plant

-June - mid-August 1 hour (depending on size of plant)April - May Use secateurs to cut back all the long shoots that have been produced during the late spring and early summer. Make the cut just beyond the second or third bud from the base.AdamMake sure

Leaves and sometimes stems are marked by dark blotches caused by a fungus. The spores overwinter on fallen leaves, stem lesions and bud scales, and reinfect the plant the next spring when there's a flush of new foliage. If these leaves

Aptly named blackspot is a fungus that causes dark spotting on rose leaves and stems. Eventually, leaves turn yellow and drop off before autumn. Spores overwinter on the fallen leaves and re-infect the plant in spring when new foliage appears

-growing alpine phloxes are covered in blooms from late-spring to early summer, as is the glossy mat of saxifrage.March - April April - June20 minutesThrift, Armeria maritimaAlpine phlox, Phlox douglasii 'Lilac Cloud'Saxifrage, Saxifraga 'Triumph'Wall container

stems, Verbena bonariensis can be planted alongside a variety of different bananas, ginger lilies and bamboos.Design ideasSeeds can be sown directly in the ground in spring, or you can start them off under glass in late-winter, then pot them on to plant