Join the RHS today and support our charitable work
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Free entry to RHS members at selected times »
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Help us achieve our goals
Join the RHS today and support our charity
Like many other plants, lawn grasses can suffer from rust diseases, which cause the leaves to look yellow and unsightly. Rust usually develops in late summer or autumn.
Lawn: rust disease
Rust is a common foliar disease of turf. It is caused by various fungi, usually Puccinia or Uromyces species. Infected areas may produce huge numbers of air-borne spores.
Typical symptoms of lawn rust include;
There are no fungicides available to gardeners for the control of rust on lawns. Chemical control of rust is usually unnecessary, however, as the symptoms are temporary. Even lawns that are heavily infected in autumn will usually produce healthy growth by early summer of the following year.
The orange pustules produce summer spores that can be carried for long distances on the wind. They need several hours of surface wetness in order to germinate and infect the leaf. Rust is therefore most prominent in wet summers, and particularly in autumn when heavy dews provide extended periods of leaf wetness. The black pustules produce over-wintering spores that are adapted to survival in cold conditions.
Lawns lacking in vigour (due to factors such as nutrient deficiency or drought stress) are often more prone to attack. Rust is often very noticeable on long grass or where trees or shrubs overhang the lawn. In these situations the grass is slower to dry out after rainfall or dew.
Dry patchFairy ringsFusarium patch and snow mouldLawns in shadeLawns: autumn careLawns: care during droughtLawns: dead patchesLawns: mowingLawns: repairingRed threadSlime moulds on lawns
the RHS today and get 12 months for the price of 9
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.