Dollar spots

Symptoms

Straw-coloured circular patches of about 2-5cm across.

Cause

A fungus which is encouraged by compacted soil and a high pH. It is particularly prevalent in damp, mild weather.

Harm

They are very unsightly but usually affect only high-quality luxury lawns. However, these are exactly the type of lawns where the patches will really show up!

Treatment

  • Chemical - Feed with a nitrogen-rich fertiliser in the spring.

  • Organic - Improve the condition of the soil. Firstly aerate by spiking it with a fork. Also, remove the thatch (the old grass cuttings that gets bedded down at the base of the grass blades) by raking it out in early autumn.