Why When And How To Dethatch Your Lawn 4. there’s a difference between a lawn dethatcher vs. aerator, and a right time to use each. it’s easy to confuse lawn dethatching and lawn aerating.both tasks improve the state of your grass. Generally, lawns prone to thatch buildup should be dethatched once a year. “dethatching is typically done when the lawn is growing and able to repair and recover, and when weather conditions are conducive to survival (not too hot, cold, dry, wet…),”. mann says. in most growing regions of the u.s., this means the spring or fall, when warm.
How To Dethatch Your Lawn A Step By Step Guide вђ Trugreen It is also important to continue to test your lawn every 2 4 years. for most lawns, dethatching every third year will be sufficient. there are also a few things to add to your lawn. first you will need to make sure to test the ph of the soil (you will want it between 5.8 7.2, amending with lime if needed). The best way to know when to detach is to measure the amount of thatch that has accumulated in your lawn. you can do this by digging up a small amount of grass and soil. then use a ruler to take a measure of the thatch. if it has accumulated to be more than 1 inch, then it is time to dethatch. if it has accumulated to more than two inches, then. A moderate thatch layer serves a purpose. it can protect lawns from foot traffic and decrease soil compaction, acting a bit like a shock absorber for the lawn, says waltz. thatch can also act like mulch in a garden bed — slowing water evaporation and insulating soil. a layer of thatch should not exceed 1 3 inch to 1 2 inch for both cool. The hard, deep raking involved in dethatching can tear at grass roots and even open up the lawn to disease and pest problems. in addition, a moderate layer of thatch can be beneficial to: moderate soil temperature swings. preserve soil moisture. maintain a uniform soil ph of about 6.5, ideal for turf grasses.
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