How to Apply Coffee Grounds to Lawn


There are many ways to deal with a pesky weed problem on your lawn. But one of the most effective solutions is something you’ve probably never even thought about: coffee grounds. The good news is that there’s no need to buy expensive commercial herbicides or pesticides – just put some used coffee grounds around the base of any plants you want to protect, and it will do the trick. Coffee grounds can also be sprinkled on top of the soil as an organic fertilizer, and they help repel slugs and snails! In this article, I will discuss applying coffee grounds to lawns. So let us get started.

How to Apply Coffee Grounds to Lawn

What are Coffee Grounds?

Lawns need some attention and care, just like any other green area in the house. This is not a complicated process, but it does require time and patience to make your lawn greener and shinier. One of the simplest methods available for this is applying coffee grounds on it. Coffee grounds are rich in nitrogen, which is crucial for healthy plant growth.

Coffee grounds can be used as a substitute for chemical fertilizers as they have three times more nitrogen than commercial fertilizers do. However, there are some drawbacks to using only coffee grounds. Other nutrients found in coffee, such as potassium and magnesium, may also improve soil quality.

Still, plants aren’t absorbed so quickly due to their large size, making them harder to dissolve in water. Coffee grounds also work much better when used with other compost materials such as leaves, grass clippings, or animal manure.

Stepwsie Guide on How to Apply Coffee Grounds to Lawn:

Pick up some fresh ground coffee

Step 1:

Mix one cup of used coffee grinds with 4 cups of water in a bucket of water. With a small paintbrush, scrub the mixture onto any bare spots on your lawn that have turned brown over time or due to drought or other conditions. This simple step adds nitrogen and other nutrients back into your soil and provides a good spot for grass seed to take root and grow healthy new blades.

Step 2:

Pour out the bucket of brown sludge from the first step around those same yard areas and wherever you see patches throughout your lawn.

Step 3:

Pick up some fresh ground coffee from your local store – do not use any from the freezer section! Coffee contains potassium, phosphorus, and other minerals, which make it very beneficial for your lawn.

Step 4:

Again, mix one cup of fresh ground coffee with 2 cups of water in the bucket of water. This time, with your paintbrush, brush this mixture onto the same spots on your lawn where you used the old coffee grounds. This step will add nutrients to help aid grass seed growth if you are reseeding bare patches or thinning out its coverage in some yard regions.

Step 5:

Let both mixtures sit on your lawn according to how long it takes for them to dry (about 30 minutes – 1 hour).

Step 6:

Water lightly with about .5 inches of water over each spot where you used any coffee mentioned above mixtures. This will help each application sink further into your soil and be more effective in encouraging grass seed growth.

Step 7:

And presto! You should see new growth within 1-2 weeks, depending on weather conditions and the time of year is. Leaves, branches, and grass clippings from your lawn can also be used to add nitrogen to your soil – be sure they aren’t full of chemicals before adding them back to the earth.

Precautions While Performing How to Apply Coffee Grounds to Lawn:

While applying used coffee grounds in your garden

1. Do not apply fresh coffee grounds to your lawn; they will burn the grass and leave a brown patch on it.

2. Use used filter coffee ground if you want to get rid of slugs in your garden. Otherwise, use composted soils for the healthy growth of grass.

3. If you are applying caffeinated coffee grounds, then make sure that no one, including yourself or your pets, drinks it as it may cause serious harm when ingested by them (dogs).

4. While applying used coffee grounds in your garden, mix them well with other soil before planting them so that the caffeine present in the coffee does not seep into the root area of plants. Also, do not plant roots near where applied used coffee grounds earlier.

5. The optimum pH for the soil applying used coffee grounds is 5.5-7.0. If your soil’s pH level falls on either side of this range, add acid or alkaline to get it back on track before you apply used coffee grounds in your garden.

6. For best results, use fertilizer and coffee ground applications to help enhance the growth of grass and plants.

Advantages of Coffee Grounds:

Coffee Grounds help retain moisture

As they were earlier used to make our daily cup of coffee, these grounds consist of some essential nutrients like nitrogen, potassium & phosphorous, which are very helpful in keeping your garden greener than ever!

These Coffee Grounds help retain moisture-retaining in the soil and improve its drainage properties. When mixed in proper quantity into the soil offers an effective way of controlling the weeds.

Coffee Grounds as a High Nitrogen Fertilizer:

As said earlier, these grounds have about 4% nitrogen, which helps maintain plants’ healthy growth & development. They are also helpful in revitalizing the soil as they release elements slowly over some time,

as and when required by the plant roots. In this way, your garden will never be deprived of essential nutrients! All you need to do is mix few coffee grounds with paths or flower beds to get rid of those extra-long grass & weeds.

Coffee Grounds as a Weed Suppressant:

Coffee Grounds help improve soil texture and control unwanted weed growth too! According to scientists, this is due to the high acidity content of coffee grounds. This acidic nature helps kill the seeds of unwanted plants sown in the garden by birds & other animals,

along with preventing germination of these seeds when they fall on the soil surface. You can also use your leftover coffee granules around the base of established plants to save them from weeds!

Coffee Grounds for Better Soil Structure:

Coffee Grounds have a high concentration of Fulvic acid, which has tremendous power in forming humus in the soil structure. This helps retain organic matter present in the soil,

giving it a healthy system so that nutrients & moisture are retained better. Their gradual decomposition also improves the nitrogen content in the ground providing food for essential microorganisms helping good bacteria to thrive.

Coffee Grounds & Soil Ph:

According to studies, soils with a pH level of 6.5 or more are beneficial for the plant roots. Coffee Grounds tend to increase acidity in the earth, so it is always better to check your soil’s pH levels before applying coffee grounds all over the garden!

If your garden has an alkaline nature, this dilute acidic coffee can help reduce its ph and thus provide essential nutrients for the grass and plants.    

Will the Coffee Grounds Harm the Grass in Any Way When They Are Applied?

Compounds found in caffeine can encourage fungal growth

Nope. The acid in coffee is not strong enough to kill grass, and there has never been a study that suggested this was likely. However, it might be wiser to add some lime when you add coffee grounds because of their acidity level (It’s higher than compost, which provides enough nitrogen for your lawn).

Also, if you have fungus problems, avoid adding fresh coffee grounds because the compounds found in caffeine can encourage fungal growth, causing diseases like leaf spots or powdery mildew.

On the other hand, some people suggest that applying “used” coffee grounds will not cause any problem because once the plant uses the caffeine, little remains to encourage fungal growth.

Can You Put Too Much Coffee Grounds in Your Garden?

You can put too much of anything in your garden. However, too many coffee grounds may harm the soil pH and affect how well plants grow. It is suggested to add no more than a third of a pound of coffee grounds per square foot of soil,

so long as you are sure there is proper drainage or enough permeable dirt so that the water does not run off and leave your newly added nutrients in puddles. Even though we often hear that we should count our compost to our gardens,

and in this case, coffee grounds which typically contain nitrogen (which becomes available when microbes feed on it) would be beneficial, but if you’re adding it by weight, you might want to think twice about dumping out half or more of your morning cup.

It is recommended to add coffee grounds sparingly and in moderation, not just because of the potential to create water-repellent soil but also due to the high concentration of caffeine in coffee grounds. 

Excessive caffeine consumption by plants can be detrimental, causing stunted growth or even death. If you have been adding too many coffee grounds to your garden, compost it first before applying it to your plants.


Creating a beautiful and lush lawn is possible within a reasonable time without spending a lot of money on fertilizers. Now you know about How to Apply Coffee Grounds to Lawn. I hope this article has been beneficial in all aspects. Thank you and have a nice day!

Jennifer Branett
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