Gardeners Warned: Act Now to Prevent Rusty Lawn Disease

Gardeners are being urged to take immediate action to prevent a condition known as “rust disease,” which can weaken grass during late summer and autumn, particularly under drought conditions. The current weather pattern affecting the UK has heightened the risk of this fungal infection, which can turn lawns a striking rusty orange.

Rust disease is caused by various fungi, primarily from the species Puccinia and Uromyces. These fungi spread through airborne spores, which can coat grass and even stain clothing when individuals walk over affected areas. According to the Royal Horticultural Society (RHS), “Rust is a common foliar disease of turf… Infected areas may produce huge numbers of air-borne spores.”

The RHS further notes that while severely affected leaves may turn brown and shrivel, rust does not typically kill the grass. The disease is most prevalent in late summer and early autumn, particularly between May and November. As noted by Moorlands Lawn Care, conditions such as excessive moisture combined with warmth can also contribute to rust outbreaks outside this typical timeframe.

Currently, there are no legal chemical treatments for grass rust in the UK, making prevention crucial. The disease tends to occur more frequently in long grass that has not been mown. Additionally, drought conditions, such as those recently experienced, can exacerbate the situation. “The stress on the grass is mainly due to the decrease of nutrient levels, lack of moisture, and if grown in shade,” explains Moorlands Lawn Care.

To combat rust disease, experts recommend regular lawn maintenance. The RHS advises feeding grass during the growing season while avoiding high-nitrogen fertilizers, which can encourage lush growth that is more susceptible to rust. Regular mowing and pruning overhanging trees to increase air circulation can also significantly reduce the risk of infection.

As gardeners navigate the challenges of maintaining healthy lawns during this season, proactive measures will be essential to prevent the weakened grass from succumbing to more severe diseases, such as red thread or fusarium. By taking these steps now, gardeners can protect their lawns from the unsightly and damaging effects of rust disease.