Blighted tomato crop

Five ways to prevent tomato blight

Discover how to prevent tomato blight with our five preventative tips, including resistant varieties.

Overview

Tomato blight is an infection caused by the fungus, Phytophthora infestans. Also affecting potatoes, blight is spread by wind and water-splash, and is particularly prevalent in warm, wet weather.

To prevent the frustration of losing your crop of tomatoes to tomato blight, it's worth taking some simple steps to avoid it. Plants grown outside are more susceptible to infection, so you could also try growing tomatoes in a greenhouse, or grow blight-resistant varieties – there are plenty out there to try.

Follow our five simple tips to avoid losing your crop to tomato blight.

Advertisement

Keep them dry

Keep tomatoes dry – use an umbrella of polythene or a plastic roof over tomatoes planted outdoors to keep the rain off them.

Provide good ventilation

Make sure there is good ventilation around the plants – keep the sides of any cover open and try to condensation building up. Thin out some branches of vigorous bush varieties and remove weeds to allow air to circulate better.

Plant early

Plant early to try for a harvest before late blight hits. Do not plant near potato crops that are susceptible to blight.

Choose resistant varieties

Choose a good resistant variety, such as ‘Losetto’ or ‘Lizzano’.

Practice good hygiene

Destroy blighted foliage to reduce chances of infection. Don’t leave potato tubers in the ground at harvest as they could harbour blight. Blighted foliage can be composted away from the crop as spores need a living host to survive for more than a few weeks.

Blight is spread by wind and water-splash, and is particularly prevalent in warm, wet weather.

Advertisement

Grow early ripening varieties

Cherry tomatoes tend to be less likely to catch blight than beefsteaks, because they ripen earlier and are often harvested before blight hits. 

Discover more ideas and inspiration

Related content

Sweetest tomatoes to grow

Top tomato varieties to grow

How to pot on tomato seedlings

Related offers

FREE P&P

Subscriber only content

Save on raspberries

These cell-grown raspberries will establish in their first season for delicious fruits year after year. Save £6 when you buy the collection of 12 plants for just £31.90, plus free p&p.

Unlock now

Offer

Subscriber only content

Save £6 on strawberries

Heavy-cropping mid-summer variety 'Sweetheart', and new late-season 'Cupid', together will produce an extra long crop of delicious strawberries. Save £6 on the collection with this offer.

Unlock now

FREE P&P

Grow your own kale

Enjoy free p&p, worth £4.95, when you buy kale 'Nero di Toscana' - you can buy 30 plants for just £10.90. It's easy to grow with a delicious flavour.

Use code: GWD17JUN

Order now