May 5, 2026, 1:23 pm | Read time: 3 minutes
Scarifying is a useful maintenance measure to get rid of lawn thatch and ensure a well-kept green in the garden. But is the effort really necessary, or can you manage with a home remedy? A professional explains on myHOMEBOOK.
Scarifying, along with mowing, is one of the typical gardening tasks if you aim for a healthy, fresh, and green lawn. However, unlike a mower, not all garden owners have a scarifier in their shed. Occasionally, it is recommended to use a classic home remedy instead of scarifying the lawn–namely, coffee grounds. These are likely to accumulate in most households anyway. myHOMEBOOK asked a lawn expert about this and whether the home remedy is really an alternative.
How Coffee Grounds Affect the Lawn
According to Dr. Harald Nonn, former chairman of the German Lawn Society, coffee grounds are an “organic substance with low nutrient content” and “various pH levels.” These range from acidic to slightly alkaline. Nonn explains the advantage of coffee grounds for the lawn: “They can serve as a food source for soil organisms and thus promote them.” However, soil organisms also break down other organic substances–including lawn thatch. “On biologically active soils, there is no need to scarify or significantly less,” the expert notes.
Thus, coffee grounds have an indirect effect on the lawn–namely through microorganisms–and not a direct one. Nonn adds: “On soils with limited soil life, coffee grounds will have little or no effect.”
More on this: Coffee Grounds as Fertilizer for the Lawn? Expert Explains
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Do Coffee Grounds Eliminate the Need to Scarify the Lawn?
“If you want, you can sprinkle coffee grounds on your lawn,” says the lawn expert. However, he cannot provide specific details on the amount and frequency. Additionally, it is not certain that using coffee grounds will truly eliminate the need to scarify the lawn. According to a rule of thumb, you should scarify at least once, at most twice a year.
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Nonn recommends first observing whether the coffee grounds are broken down by soil organisms and whether any existing lawn thatch is reduced as a result. “If this is the case, you can skip scarifying,” the expert concludes. If not, you will need to tackle the thatch mechanically–that is, with a scarifier. Whether it is worthwhile to scarify the lawn again in the fall is discussed in this article.
Is It Worth Fertilizing the Lawn with Coffee Grounds?
Coffee grounds are often recommended as a fertilizer. According to Nonn, coffee grounds contain the following nutrients:
- 2 percent nitrogen
- 0.4 percent phosphate
- 0.8 percent potassium oxide
“Thus, the nutrient ratio is quite suitable for lawns, but the nutrient content is very low,” the lawn expert explains in response to a myHOMEBOOK inquiry. To fertilize the lawn, a large amount of coffee grounds would be needed.