Lawn Aeration: How Deep?

Written by kimberly richardson
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Lawn Aeration: How Deep?
Play, traffic and clay soil contribute to compacted turf. (Jupiterimages/BananaStock/Getty Images)

You mow your lawn, you fertilise your lawn, but you may not remember to aerate your lawn. Yearly aeration reduces soil compaction and breaks through layers of thatch, ensuring healthy turf from the roots to the blades.

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Types

Spike aerators push solid tines into the soil. They are not as efficient as core aerators, which remove a plug of soil and deposit it on the lawn surface. Both styles are available as manual rollers or as more efficient mechanical aerators.

Depth

Aerate at least to the depth of your lawn's roots. Use a shovel to determine the depth. Aerator tines may reach from 1 inch, which is fairly ineffective, to 6 inches. According to the Colorado University Extension, aerate as deep as possible, spacing cores 2 inches apart.

Lawn Aeration: How Deep?
The deeper the roots, the healthier the lawn. (grass,lawn image by Greg Pickens from Fotolia.com)

Tips

Mark sprinkler heads and shallow utility or cable lines before aerating. Do not aerate new lawns for the first year. Water the lawn 2 days before aerating to soften the soil, but do not aerate muddy or wet lawns.

Lawn Aeration: How Deep?
Avoid sprinkler heads and aerating near the roots of shrubs or trees. (sprinkler image by Joann Cooper from Fotolia.com)

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