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to secure them.Provide supportChoose disease-resistant varieties to avoid blackspot, mildew and rust, though in warm and humid summers, even disease-resistant varieties can be affected. Rake up and remove fallen rose leaves to reduce the risk of reinfection

as the pustules erupted from nearly every leaf.The pears too had rust - a sight I've only ever seen a handful of times (and that includes working as plant pathologist at RHS Wisley for 11 years, examining thousands of decrepit plants each year). Presumably it

of them. Bare-root rose plantSpadeForkBamboo caneGranular fertiliser, such as chicken manureDecember - mid-March 20 minutes for each rose June - AugustDig out a hole in the soil to the depth of a garden spade and the same width. Put the soil to one side

affect other plantsspring, summerDealing with other problems affecting rosesPreventing rose bloom ballingDealing with rose rustTreating rose blackspotRemoving rose leaf rolling sawfly

Pick off leaves infected by rose blackspot or rose rust, and dispose of them in your dustbin and not on the compost heapSet up an automatic watering system with a drip nozzle for potted plants if you're going on holidayTop up water levels in ponds

Plant gladioli in groups to depth of 10-15cm, planting onto gravel if you have heavy soilComplete outside sowings of hardy annual flowers Lightly clip box edging and topiary to neaten them upSpray new leaves on disease-prone roses with fungicide

the season.rosesall year roundMore common problems affecting rosesPreventing rose bloom ballingDealing with rose rustTreating rose powdery mildewRemoving rose leaf rolling sawfly

or lightly shaded, sheltered spot against a fence or wall.AdamGive your roses a boost with a slow-release fertiliser in March and again in July.More advice on growing rosesAdvice on dealing with rose rust.How to prevent rose bloom balling.Taking rose cuttings

Gradually lower the cutting height of your mower as grass growth increasesSpray roses showing signs of diseases such as blackspot, rust or powdery mildewApply a combined weed, feed and moss killer to your lawn if you think it needs itTop up water

the affected parts. In a few cases genetic mutation is the cause, and the deformity will be permanent.delphiniums, forsythias, lilies, primulas and other plantsspring, summer, autumn, winterCommon problems affecting plantsReversionMagnesium deficiencyRose rust