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The Hole Truth About Aerating a Lawn
Aerating your lawn is a great way to reduce thatch, loosen up compacted soils and make it easier for water and nutrients to reach the roots of your turf.
Even with the best care available, lawns can thin out and lose color due to excessive thatch buildup, hard or compacted soils, or periods of high temperature, high humidity, or drought. Aerifying and overseeding is recognized by turf experts such as golf course superintendents as the best treatment to control thatch, reduce compaction, fill-in bare spots and revitalize growth.
Aeration/Seeding—the two step process guaranteed to improve your lawn
An aeration treatment removes small cores of soil and thatch to allow air, moisture and fertilizer to penetrate down to the root zone. The cores brought to the surface contain microorganisms, which help the breakdown of the woody thatch tissue. This allows the roots of existing grass plants to spread out and grow deeper, creating a healthier, thicker lawn.
Overseeding in cool-season areas will fill-in bare or thin spots and help build a thicker lawn faster. The new seed quickly takes root in the freshly aerated lawn and provides new life to your already established grass. As your lawn gets thicker and healthier, your new grass plants help reduce the chance of new weeds sprouting.
Does your lawn need aerated?
While aeration is beneficial for many lawns, it isn't appropriate for every situation. Here are come guides to determine if your lawn needs this service:
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When the soil is compacted
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When the thatch layer is more than 1" thick
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If you're going to overseed your lawn. Aeration exposes soil and provides better seed-to-soil contact needed for good seed establishment.
When is the best time to aerate?
Soil temperature is the best indication of when to aerate. Studies have shown that for cool season grasses in particular, soil temperatures in the 50 — 65 degree range is the ideal time to aerate a lawn. It is when temperatures are in this range that grass roots can grow as much as 1" a week. Aggressive core aeration will promote healthy root development by providing an oxygen-rich environment, plus it allows more water into the soil at an important time in the roots development cycle.