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if the weather is very hot or windy - and feed with tomato food once a week. If frost is forecast in May, bring the basket under cover.AdamPick the tomatoes as they ripen to encourage the plant to produce more fruit. Over the summer, trim away any leaves

Alliums are spectacular plants and it's worth saving a few seeds to sow in the spring to grow some more for the garden. The seeds will germinate quickly and reach flowering size in a couple of years.SecateursPaper envelopesSeptember - October20

, daffodils and crocusCreate a spring window box of tulips, thyme and honeysuckleVideo advice on picking tulips,from Sarah RavenHow to deal with tulip virusHow to deal with tulip fireBrowse tulip speciesGrowing tulips - Gardeners' World blog by James Alexander-Sinclair

to improve, so then will the crop.Baby courgettes fail to develop. Instead of growing into a long or round shape, they quickly rot on the plant.Pollinate the early batch of flowers by hand, rather than relying on insects. Pick an open male flower (which doesn

The caterpillars of both the small and large cabbage white butterflies are are the two culprits. The first is pale green with a body up to 2.5cm long, the second is bigger at 4cm and is yellow with black markings. The adult butterflies lay eggs

an attractive form of wildlife, large colonies can strip leaves bare.Shredded leaves caused by an infestation of caterpillars. In some cases, the leaves are completely decimated and the plant can die.Pick them off by hand and dispose of them, keeping a special

, and can be picked off by hand.The moment you spot an infestation, spray them with pyrethrum. If the plants are in flower, spray in the evening, so pollinating insects aren't affected.verbascum, buddleia, figwortsmid-spring to midsummerMore advice

, nibbling U-shaped notches out of the edges.Pick off the beetles by hand and destroy.broad beans, peassummer, autumn, winterMore advice on growing peas and beansKeeping capsid bugs away from beans.Watch Monty's video demonstration on sowing pea seeds

.Promptly pick off and destroy affected leaves. If leaf spot is a persistent problem, try growing your primulas under glass.Spraying with myclobutanil may help give some control, although they're not specifically labelled as a solution for primula leaf spot

is quickly ruined, and even if it's immediately picked you can't stop the tomatoes rotting.Ripening tomatoes develop brown sunken spots, which spread to the leaves and stems.Remove blight-infected plants as soon as they are identified, to prevent spread