Moss thrives on any lawn which is very wet, where the soil is compacted, or where grass is constantly kept too short. You can eradicate it by applying a proprietary brand of moss killer, or sulphate of iron, but if the conditions are not permanently addressed, the moss will return year after year. Sometimes, the only solution is to replace the lawn with a moisture tolerant grass. Spiking the lawn with a fork or a lawn aerator late in the year will let the air in and reduce moss growth and it’s not a bad idea to spike a healthy lawn anyway to prevent moss becoming established.

If you use Sulphate of Iron (ferrous oxide) to kill the grass, keep it off any concrete or stone paths as it will turn the concrete a permanent rust colour.