Lawn thatch is the layer of dead turf-grass tissue between the green foliage and the soil surface. It chiefly consists of products that arise from stems, leaf sheaths, and roots that are fairly resistant to corrosion. A process known as "dethatching" to maintain lawn health must remove this. Though a little thatch is beneficial to withstand any possible deterioration of the lawn, excessive thatch is a hotbed for disease- causing organisms and can severely damage the lawn.

Thatch development occurs when soil is compacted, over-watered, poorly fertilized or under-populated with earthworms and soil insects. Grasses with robust growth can develop thatch easily. While adequate nutrients are necessary for lawn development, excessive nutrients, particularly nitrogen can result in thatch formation. Infrequent mowing and poor watering techniques are some other reasons. If the thatch is more than one-half inch, then de-thatching has to be done.

To dethatch, vigorous raking or the use of a mechanical dethatcher can do the job. Another way is to aerate compacted soil using a mechanical Aerifier. This stimulates microbial activity that decomposes the thatch layer. Pesticides should be judiciously used as they can inhibit microbial activity. Mowing should be done regularly, so that there is no thatch build up. Slow-release fertilizers also aid in preventing thatch build up.

This is also another great article about fertilizing you lawn & garden.

If you like lawn care....These pages might also interest you:

All About Weeds, Common Lawn Problems, Controlling Lawn Diseases, Four Steps to a Great Lawn, How to Water Your Lawn, Inexpensive Lawn Fertilizer, Lawns in Shady Areas, Thatching, Turf Secrets, Types of Lawn Recreation, Care Free Lawns, Creating a Perfect Lawn, Earth Friendly Golf Courses, Feeding Your Lawn, Fertilizing Basics, Mowers and Pollution, Natural Ways to Fertilize, The Right Time To Fertilize, Types of Lawn Fertilizers