Patches and Spots On Lawns

Spots on lawns can be an indication of many possible problems including lawn disease. These spots are often characterised by brown patches or circles on the lawn which will range in size from the size of a dollar coin an up to a metre or more in diameter.

Lets take an overview of some of the causes of brown patches, circles or spots on lawns. The following list is not exhaustive but an overview of the most common causes of the problems.

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Compacted Hard Lawn Soils

The soils underneath lawns naturally become compacted over time as lawns are walked on, played on and even driven on or ridden on by cars and kids bikes.

The affect of compacted lawn soils is that the soil granules are become so tightly squashed together that water, oxygen and nutrients can no longer flow freely within the soil and to the roots of the lawn. The roots of the lawn will also become restricted and will have a stunted growth which further impacts lawn health most severely. As the problem continues to get worse over time, the lawn will become sickly and often feeling hard under foot, eventually reaching a stage of continuing poor lawn health.

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Reasons For Over Seeding Lawns

Over-seeding lawns means to put down new lawn seed on top of an existing lawn. This is done for the purpose of re-seeding an existing Cool Season lawn to help thicken it up and repair damage. But it is also done with Warm Season Lawns which are over-seeded for with a Cool Season grass for Winter.

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The Purpose Of Lawn Aeration

Lawn aeration is undertaken for the purpose of repairing compacted soils by opening up the soil profile underneath a lawn, this breaks up the soil to allow more free flowing of Oxygen and Water, two components which are vital to the root systems of lawns in order that they survive and thrive.

Over a period of years as lawns continue to be used for their intended purposes, the soil underneath them will become more squashed and compacted. Oxygen can no longer flow freely to the lawn roots and water can no longer penetrate the soil nor distribute effectively within the soil, and as a result lawns will become more sick as time goes by.

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Lawn Coring

Aerating lawns is often required when soils become compacted and can no longer provide the free flow of water and oxygen required by the lawn to survive. The most popular and most effective method of aerating lawns for homeowners is to use a lawn coring machine.

As the lawn corer moves over the lawn, it will punch holes into the lawn and soil with it's hollow tynes, as the tynes pull out of the soil it removes plugs of soil, thatch and lawn, leaving open holes in the lawn's surface.

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Hard Soils Underneath Lawns

Soils underneath lawns can become hard for many reasons, most often it is simply due to the regular use of the lawn, and the soil becomes compacted. This is usually a simple fix with lawn coring being the most suitable solution.

Certain soil types are also more prone to becoming hard more quickly and more severely, and in these cases the solution may be somewhat more involved, or even costly depending on what the lawn owner wants to achieve as a long term solution.

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