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hot spells and provide shading. Promptly pick off any split tomatoes before they start to rot.tomatoessummer to autumnCommon problems affecting tomatoesTomato leaf mouldTomato blightTomato frost damageBlossom end rot

The fungus that causes this problem spreads rapidly in the warm, humid conditions of a greenhouse. It usually becomes apparent on the lowest tomato leaves from early or midsummer, which develop yellow blotches on the upper leaf surface. The leaves

(causing no damage) to be taken up by the sap-sucking whiteflies.tomatoes, cucumbers, fuchsias, other greenhouse plantsspring, summer, autumnMore common garden pestsAphidsLeaf miner flyEuonymus scaleMealybugs

. Space plants out to ensure good air circulation, and water early enough in the day to allow the leaves to dry out before nightfall. Also remove any garden debris that might harbour the fungus.lettucessummer to autumnMore common fungal problems

's more prone to infection. Spray with myclobutanil.marrows, courgettes, pumpkins, squashsummer, autumn, winterCommon fruit and veg problemsTomato blightGooseberry mildewGrey mould on soft fruitsSooty mould

Caused by the same fungus responsible for tomato blight, potato blight causes the leaves to develop dark patches, starting at the edges. In humid conditions a white fungus appears around the marks. The infection then travels down the plant