Thatch problems are due to a combination of biological, cultural, and environmental factors. Cultural practices can have a big impact on thatch. For example, heavy nitrogen fertilizer applications or overwatering frequently contribute to thatch, because they cause the lawn to grow excessively fast. Overwater and using these "quick greening," heavy nitrogen level fertilizers increase the amount of top growth without providing much root support. Lawns subjected to these conditions are likely to have developed thatch. Avoid overfertilizing and overwatering.
Despite popular belief, short clippings dropped on the lawn after mowing are not the cause of thatch buildup. Clippings are very high in water content and breakdown rapidly when returned to lawns after mowing, assuming lawns are mowed on a regular basis (not removing more than one-third of the leaf blade). A thatch depth of ¼ inch or less is acceptable. Your clippings are collecting and decomposing at a good rate.
If you’ve got a ¼ inch or more it’s time to think about thatching or aerating. (Insert a metal ruler or tape measure into the turf until it hits the soil.) With a thatch that's too thick you’re inviting unwanted guest and preventing your soil from getting much needed moisture as well as oxygen to your root systems.
Many local gardening suppliers will lease equipment. Keep in mind; when you rent this type of machinery, it will take two or more to transport. If you’re not familiar with operating one you may want to hire some one.
There are thatching mower blades you can use in place of your cutting blade. And again, if your not familiar with changing blades on a lawnmower, I highly recommend you get someone else to do it. There’s a lot more involved than what meets the eye. Aeration holes can be very beneficial, but unless your soil is completely compacted where rain water runs off, it’s not necessary to tackle thick thatch. It is, however, great for your soil and your grass roots.
As you stroll through your yard. Landscape USA makes this possible with a pair of aerator shoes.
We recommend reading user reviews before making a purchase of any of these products or services. Sometimes working "smarter not harder" doesn't always yield the best results.
There are also decomposition products available at garden supply stores and nurseries that you can spread on your lawn to help decompose thatch by means of microorganisms. Ringer's Lawn Rx ™ is a product that will do this and you won't have to break your back. Remember, far, organic thatch control through biological means has proven inconsistent.