How To Use Coffee Grounds in your garden

Learn the pros, cons, and how to properly use coffee grounds in your garden.

Coffee grounds can be excellent for gardening if used properly. 

Not only can coffee grounds be used as fertilizer but also as mulch, compost, and pest repellent. 

It’s important to follow proper procedures and guidelines when using coffee grounds in your garden, all of which are outlined below. 

There’s a heated debate as to whether or not you should use coffee grounds in your garden. Some will tell you that coffee grounds work great while others will warn you to steer clear from the practice completely.

So who’s actually right? The truth is that both sides of the “coffee grounds in the garden debate” have valid points, which makes both sides correct. In short, coffee grounds are rich in nitrogen and other micronutrients, which can be really good for your garden if you are using them in the right way. With that being said, if not used properly, you might end up harming your garden. In this article, you will learn everything you need to know in order to use coffee grounds in your garden properly while also learning the necessary techniques and tips to avoid harming your garden with coffee grounds. Let’s get started!


Coffee grounds are the waste material or the remaining ground coffee beans after brewing coffee. If you are a regular coffee drinker, then it’s easy to pile up a lot of coffee grounds. Also, when it comes to coffee shops that use industrial coffee grinders to produce large quantities, they amass a huge amount of coffee grounds and most likely, they’d be happy to give it away to be used in your gardens. 

Coffee grounds can be used in your garden in many different ways such as to make fertilizers, improve soil quality, keep away pests, and organic material for worm bins. They are also rich in nutrients including nitrogen, potassium, and phosphorus, as well as other micronutrients. Throwing away precious coffee grounds just doesn’t feel right.


Before we start, there are a few fundamentals that we need to establish so that you know what you are doing and so that you feel safe about your beloved garden. 

First off, coffee beans are slightly acidic, but used coffee grounds are nearly neutral in pH. You don’t have to be super concerned about the acidity when working with used coffee grounds —  emphasis on “used.” 

Secondly, coffee grounds do have antimicrobial properties and caffeine in them. But here again, the content is very low since they are used coffee grounds. We say this to merely to give you peace of mind when starting to garden with coffee grounds. 

Thousands of gardeners, ourselves included, are using coffee grounds in their garden and getting great results. If, however, you are concerned, try using coffee grounds in only a small portion of your garden as an experiment to see the results. Then you can go full scale when you feel more comfortable. 

There are many advantages and different ways to use coffee grounds in your garden. Let’s get into them one by one with the right measurements.


It’s very easy and direct to use coffee grounds as fertilizer for your garden. Simply sprinkle the ground coffee over your soil. It’s ideal if you rake it a bit so that it gets into the soil properly. Just make sure you don’t put too much at one go. You don’t want them to clump together and create a water-resistant barrier. 

Coffee grounds can be also used in the form of liquid fertilizer. All you have to do is add ground coffee to water ( 2 cups in 5-gallon bucket ratio) and let it steep overnight, and then directly use it as liquid fertilizer for your garden soil. They are excellent slow fertilizers. 

Warning: Don’t use coffee grounds on growing seeds or young plants. There’s a risk of damaging the roots or inhibiting the growth of roots. 


Compost is usually prepared by using green materials. There’s a specific ratio you need to keep in mind which is 4:1; 4 parts brown compost material to 1 part green compost material respectively. 

Greens (leaves, coffee grounds, food scraps, grass clippings, etc.) are rich in nitrogen, and browns (dry leaves, twigs, newspaper, etc) are carbon-rich materials. 

Your compost pile ought to get smelly if you put too much green material, and it might not generate enough heat if you don’t have enough greens. So, make sure you work with the right ratio and follow proper compost making guidelines. 


If you are using a worm bin for your garden, then coffee grounds are a jackpot for you. Worms simply love coffee grounds! Every week, you can add a few coffee grounds to your worm bin. Just make sure not to put too much because the accumulated acidity can have a negative impact. 


By mixing with other materials, coffee grounds can work excellently in making mulch for your plants. Just don’t use only coffee grounds as mulch, it can prevent water from getting to the soil and increase water retention. 

Simply mix a portion of coffee grounds with other mulch materials, and you will discover that it will help to prevent light from getting into the soil, create a physical barrier for weeds, and can prevent moisture loss. 


Slugs and snails can give a great headache for the garden owner. Coffee grounds work quite well to repel these tiny garden monsters. It’s not super effective like chemicals or other proven methods, but it still works quite well. 

When it comes to pets, specifically cats, they don’t like the smell of coffee in most cases. That way, they might stay clear of your garden. However, you might want to avoid using coffee grounds in your garden if you want your cats to use the area as a litter box. 


We know that used coffee grounds are not that acidic, but what about unused or stale coffee grounds in your kitchen? Well, they have high caffeine content and are quite acidic. 

Hence, they would make delicious servings for your acid-loving plants such as hydrangeas, carrots, blueberries, and others. Just keep them away from young plants and those that don’t like acid soils. 

7. Using The Right Coffee

It is important to also note that not all coffee grounds are the same. Flavored coffees and coffees with artificial ingredients should not be used on houseplants. Unfortunately, these brews can contain harsh chemicals that can harm plants. Instead, when using coffee grounds, stick with the grounds from organic coffee like Son of a Barista’s coffee. It doesn’t matter if they are regular or decaffeinated – both varieties are fine so if you want you can use our Son of a Barista Cremoso Decaf pod. You can also safely use coffee blends made from several different bean types. The key is to avoid coffees with artificial additives.

At Son of a Barista, we have 4 different kinds of coffees to choose from so you’re guaranteed to find one that’s for you! 

Try our Puro coffee pod. A single origin coffee pod using only 100% Arabica from Sidamo Ethiopia. Our single sourced Ethiopian coffee has a strong aroma, thick crema and notes of chocolate.

If you want to try a blend you can try our Cremoso coffee pod. Our Son of a Barista Cremoso coffee pod is a blend of 50% Arabica from Colombia and 50% Robusta from Vietnam. Our Cremoso coffee pod is the typical blend you would sip in a bar on the streets of Italy. This blend has a delicate taste with a strong caffeine kick.

If caffeine is not what you’re looking for and only want to enjoy the taste and creaminess of a cappuccino, you can use our Son of a Barista Cremoso Decaf coffee pod. Our Son of a Barista Cremoso Decaf coffee pod is a blend of 50% Arabica from Colombia and 50% Robusta from Vietnam. This coffee pod has the same taste as our Son of a Barista Cremoso coffee pod with no caffeine.  

Last but not least you can try making your steaming hot and creamy cappuccino using our Son of a Barista Aromatico coffee pod. Aromatico is a blend of 50% Arabica from Colombia and 50% Arabica from Ethiopia. This blend is 100% Arabica from two different plantations, balanced to smooth the initial taste of Arabica while delivering the perfect after taste.

How to use Son of a Barista used coffee grounds in your garden

After you’re finished brewing your favorite Son of a Barista coffee pod, simply open the pod dispenser and take out your pod. Use a knife to cut open the lid and dump out your used coffee grounds and use them in your garden! 


Are coffee grounds good for your garden? Well, now you know the answer for yourself. It depends on what you want and what you are growing in your garden. Now you can use those coffee grounds for the betterment of your garden instead of throwing them away.  A good cup of coffee will add more to your life and your garden! 

Leave a Comment

Your email address will not be published. Required fields are marked *



Scroll to Top