Trimming foliage and removing side shoots maximises air movement to ensure any moisture on the leaves’ surfaces evaporates away. “Ensure that potatoes and tomatoes are not planted in the same soil for successive years,” he says. Remove every scrap of foliage and tuber every year too.ĭon’t add infected tomato or potato plants to your compost heap, advises Simon Crawford, as the spores will survive, and make sure you follow a good crop rotation on your plot. “When watering potatoes or tomatoes, take care to water the ground not the leaves, as blight spores need to land on wet foliage to infect the plant,” says Mark. Tomato blight resistant ‘Rose Crush’ (left) and another of Burpee Europe’s resistant varieties, the plum tomato ‘Nagina’. Burpee Europe have been working on developing blight resistance in tomatoes for many years and have expanded their range for 2022. If that’s the case, the best option is to grow varieties that have been bred to have resistance to tomato blight, while avoiding those that are particularly susceptible. But not all of us have a greenhouse or space for one and have to grow our tomatoes outside. “I grow almost all my tomatoes undercover, ensuring good ventilation,” Mark says. The most straightforward way to avoid blight on tomatoes is to grow plants in a greenhouse. The few late varieties I grow (such as ‘Pink Fir Apple’) are grown in a well-ventilated spot as a decent breeze is the best fungicide.” I grow almost only early varieties of potato that are harvested before the threat of blight arrives. Photo: Shutterstock How can I prevent tomato blight?Įxpert vegetable grower Mark Diacono says: “Blight is a nuisance that can affect both tomatoes and potatoes. A bad infection of tomato blight can render fruit inedible.
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