Home Food and Drink Coffee Will Coffee Grounds Kill Grass And Other Plants?

Will Coffee Grounds Kill Grass And Other Plants?

Will Coffee Grounds Kill Grass And Other Plants?

People who love gardening would know how coffee grounds affect the growth and nourishment of plants. Coffee grounds are great food for plants. Because they consist of everything, a plant requires for its growth, like phosphorus, nitrogen, and potassium. However, there are some rules to apply coffee grounds in your garden. Otherwise, they might cause some costly repercussions. 

So, can coffee grounds kill plants or grass in your garden? The answer is No. Coffee grounds that are used will never burn your plants or grass. Instead, they serve as natural fertilizers. However, fresh coffee grounds have a tendency to kill your grass or plants because they have slightly acidic properties. But these grains are also used to kill weeds that can kill your sprouts even before they start growing. 

Coffee grounds work best for your garden after serving you in the kitchen. Using fresh coffee grains would have adverse effects on your plantation. Let us dive into a little more detail. 

Do Coffee Grounds Help Plants Grow?

If you want to dispose of your brewed coffee grounds in an eco-friendly manner, then here is the idea. Simply add them to your compost mixture. Although the grains are already brewed but are still perfect for fertilizing a plant for healthy growth. You can even spread the used coffee grounds directly in your garden once every week, without mixing them in the compost. Additionally, coffee grounds are great for warming the compost’s temperature, which is good for decomposing bacteria.

Do Coffee Grounds Kill Weeds?

Yes, they do. Coffee grounds are excellent suppressants of weed and prevent them from regrowth as well. For this purpose, we recommend using freshly brewed coffee grounds while they are still damp. Add them to your compost mix to warm up its temperature, thus causing the decomposition in real-time. 

When the grass is mulched with the compost mix at soil level, its heat instantly kills the weeds and other pathogens. Comprising of allelopathic features, coffee grounds stunt the germination process in the weeds, hence killing them at a very initial stage. 

What Are Some Benefits Of Spreading Coffee Grounds In Your Garden?

Following are some other benefits of using coffee grounds in your garden.

  • Fewer Insects: If used regularly, the ground’s caffeine would help keep away the insects like slugs and snails. These animals hate the powerful smell of coffee and tend to move away from the area where they smell caffeine. 
  • Kills Fungus: A fungus attack would cause ugly patches here and there in your beautiful garden. Therefore, sprinkling some coffee grounds onto the grass would help kill fungal pathogens and protect your grass from dying. 

Click on the link to watch how coffee can be a beneficial garden ingredient:


In conclusion, coffee grounds greatly benefit gardeners because they give you two reasons to simply love them. One, when you have it fresh in your kitchen. Two, you can simply sprinkle the brewed grains in your garden to activate strong plant growth by acting as natural fertilizers. These fragrant grounds are great for your gardens after breaking down entirely because of easy absorption. Therefore, if taken the proper measures, the coffee grounds will kill your grass and other plants.