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necrosis virus affects mainly early flowering cultivars and produces brown-streaked stems and leaves.Tulips display a range of symptoms from markings on the leaves and flowers with loss of vigour, to deformed plants and brown-streaked stems. Tulip bulbs

on the petals. Sometimes the flower stem collapses and the whole plant can end up covered in fungus, especially after heavy rain.Withered, distorted tulip leaves are covered in brown spots followed by a grey fungal growth. Any flowers that are produced have pale

. Height 15cm.Tulipa altaicaMore about growing tulipsFollow our video guide to planting up a daffodil, tulip and crocus displayRead Adam Pasco's blog on growing multi-headed tulipsHow to lift and store tulipsAdvice on dealing with tulip fireLearn how

.T. praestans 'Unicum', with bright red flowers, dwarf habit, and variegated foliage.T. 'Weisse Berliner', with pure ivory white flowers.Tulip bulbs can be planted far later than other bulbs and will still flower well in spring. Get daffodils and others planted

of colour and life; in the majority of cases this is to be welcomed. Hooray for the resurgence of tulips, whoopee for the return of the rose and yippee for the arrival of annuals.However, there are some plants which I am not looking forward to seeing again

mould from fallen leavesPlant drifts of lily-of-the-valley in shaded bedsFinish planting tulip bulbs outsideImprove soil by incorporating compostDeadhead pansies to prevent them setting seed

Plant out perennials in groups of three, five or seven for maximum effectSprinkle fertiliser around clumps of tulips to boost floweringSow hardy annual flowers directly into beds where you'd like them to bloomPrune Himalayan honeysuckle (Leycesteria

Plant tulip bulbs in groups to make drifts of spring colourAfter first frosts, lift and store dahlia tubers or leave in the ground but mulch heavilyPlant evergreen shrubs and conifers, including new hedgesLift tender cannas to avoid frost damage

Plant heathers and trailing ivy in pots for winter colourCut down faded stems on rudbeckia and Shasta daisies, to just above soil levelFinish planting tulips as soon as possibleClear golden hop, sweet peas and annual climbers from supports

Plant up hanging baskets, and leave them in a sheltered spot before hanging fully outsidePlant out potted alliums in groups to add interest to flower bedsPrune spring-flowering shrubs immediately after flowering, such as forsythia, ribes