Thatch is a layer of organic matter between the crown of the grass plants and the soil layer. Thatch can appear as a result of an imbalance in your soil or improper lawn maintenance practices. If the microbes in your soil are not plentiful they cannot devour the organic matter in the soil quick enough. This may result in a thatch layer developing. Up to 1/2 inch of thatch is okay, but too much thatch robs the lawn of the ability to absorb water and nutrients efficiently. It also can be a harbor for insect and fungus to attach the lawn.
We recommend removing thatch in the fall. Thatching brings up weed seeds and these are more prevalent in the spring. Use a heavy rake or thatching machine as needed to keep thatch to a minimum. The regular use of organics will help to keep thatch in order.