As we move into autumn, lawns face a new challenge – a fungal disease known as Fusarium
Following a hot and dry summer and the sudden arrival of cooler autumn temperatures, lawns throughout the UK are finding it difficult to cope with the dramatic shift. However, there’s another threat facing gardens as we head into the colder months – and it can begin with distinctive brown patches emerging.
Chris McIlroy, turf expert at The Grass People, said: “You might have grown accustomed to seeing the odd brown patch on dehydrated lawns in summer, but the issue can be just as prevalent at this time of year. That’s because Fusarium is a common lawn disease that emerges during the autumn.
“Knowing how to spot and address it can help keep your lawn healthy through the colder months. The disease presents itself as small, yellow and brown patches that expand.”
Fusarium, which is also referred to as Microdochium patch, is a fungal condition that becomes increasingly widespread during late autumn and winter.
Mr McIlroy added: “The patches may also have thin layers of white or pink mould that looks like cotton wool, which spreads easily in damp conditions. Prevent this by aerating your lawn before the first frost to enhance drainage and reduce the risk of water pooling. Nitrogen-rich fertilisers can encourage grass growth, but this can make lawns more vulnerable to Fusarium. A balanced fertiliser is the best choice at this time of year.
“If you have a severe case of Fusarium, a fungicide might be necessary. But you should always follow guidelines closely and consult a lawn care professional if you’re not sure. Fungicides can negatively impact beneficial insects and microorganisms in the soil, which are important for a healthy ecosystem so you don’t want to use them unnecessarily.”
As we head into the colder months, keeping an eye out for Fusarium and taking proactive steps can give your lawn a fighting chance against the harsh weather conditions. However, Mr McIlroy suggests clearing leaves and other debris from lawns, and limiting foot traffic when the grass is vulnerable.
He advised: “Regular monitoring will pay off. Fallen leaves can trap moisture and create a perfect environment for fungal diseases. Minimising traffic on lawns is crucial, especially during wet or frosty conditions to avoid excess damage.”