Are Coffee Grounds Good For Garden? (Explained)

Coffee grounds are a popular organic material used in gardening for their ability to improve soil health and provide nutrients to plants. Our post on Are Coffee Grounds Good for Garden Explained covers the benefits of using coffee grounds in your garden, including their ability to add nitrogen to the soil and deter pests.

For more information on organic gardening, check out our article on Are Coffee and Tea Grounds Good for the Garden.

Coffee grounds can be beneficial for plants when used properly
They can provide nutrients and organic matter to soil
Coffee grounds can be used as a fertilizer, compost, or pest control
They can be particularly beneficial for plants that prefer acidic soil
It’s important to use coffee grounds in moderation and be aware of potential risks

Improve your soil health and grow healthy, robust plants with the help of coffee grounds in your garden.

Will Coffee Grounds Make My Plants Grow Bigger?

Coffee grounds are not a fertilizer. They do not contain the nutrients that plants need to grow, but they can be used as an excellent soil amendment. Coffee grounds are rich in nitrogen, which is essential for plant growth and development. 

Nitrogen helps your plants produce full leaves and fruits with lots of color the equivalent of making them look good on Instagram!

Coffee grounds also contain potassium and phosphorus, two other important minerals that plants need for healthy growth. 

These minerals help feed the microbes living in your soil so they can break down organic matter like coffee grounds into usable nutrients for the plants to absorb through their roots.

What Happens When You Use Coffee Grounds in the Garden?

Can You Put Too Much Coffee Grounds In Your Soil?

If you’ve read through the first few sections of this article, you might be thinking that coffee grounds are a miracle worker. They can help your plants grow, they can clean the soil, and they can even repel pests. 

But there are limits to what they can do and one of those limits is how much you should add to your garden.

“Fertilizing potted plants is essential for their growth and health, but over-fertilizing can be harmful. To learn about the right fertilization schedule for your potted plants, check out our guide on how often to fertilize potted plants.”

Too Much Of A Good Thing

Coffee grounds’ high nitrogen content makes them an excellent fertilizer for all types of plants. However, too much nitrogen in your soil will cause all kinds of problems for your garden. 

Too much nitrogen leads to thinning leaves with brown spots, yellowing leaves with dark spots or streaks (which indicates a lack of chlorophyll), and stunted growth at the ends or tops of branches or vines (pea plant disease).

Fewer flowers on roses and other plants with long stems (potato scab), and stunted growth on trees where their roots aren’t receiving enough oxygen from nearby water sources like lakes or ponds (root rot). 

You get the picture: too many coffee grounds applied at once will stunt some plants’ growth while encouraging others’ growth at rates beyond normal specifications set by nature itself!

“The type of soil you use for your indoor plants can have a significant impact on their growth and overall health. If you want to learn about the different types of soil and which one is best for your indoor plants, check out our guide on what soil is best to use for indoor plants.”

Do Coffee Grounds Kill Plants?

Coffee grounds are not toxic to plants, so you can use them without worry. Many gardeners have found that coffee grounds improve the soil and provide nutrients for their plants. 

Coffee grounds contain nitrogen, potassium, and phosphorus – all of which are essential for healthy plant growth.

The high levels of nitrogen in the coffee ground make them a great source of fertilizer for your garden (in addition to being a great soil conditioner). 

However, it’s important to note that some people say that adding too much nitrogen at once can cause an overgrowth of algae or fungus in your lawn area. 

It’s best to add small amounts of coffee grounds over time so that you can slowly improve the health of your lawn instead of making big changes immediately.

Do Coffee Grounds Attract Bugs?

While coffee grounds may be good fertilizer, they can also attract bugs to your garden.

If you’re using coffee grounds to water plants in the vegetable or herb garden, then you run the risk of attracting slugs and snails. 

When these pests find their way into your home, they can leave unsightly slime trails and cause damage by eating away at the leaves and stems of prized plants. Each year about $1 billion is spent on pesticides used for slugs alone!

Coffee grounds do have some benefits though they are said to boost soil fertility because they contain nitrogen (which helps plants grow), phosphorus (which helps build strong cell walls), potassium (which helps regulate water content), and magnesium (a component of chlorophyll). 

Coffee grounds are also considered an excellent mulch material for gardens due to their ability to absorb moisture from the soil below while keeping weeds from growing above ground level since only certain types will thrive under these conditions as well

“Gnats can be a nuisance for indoor plants, but there are ways to control them without resorting to harmful chemicals. Check out our guide on how to keep gnats off houseplants for expert tips on how to deal with these pesky insects.”

Are Coffee Grounds Good For Tomatoes?

Yes, coffee grounds are good for tomatoes. Coffee grounds have a ton of benefits for your garden. Not only will they help your tomatoes to grow better and faster, but they also can help them ripen earlier and taste better!

  • They will help your tomato plants grow bigger leaves, which means more shade for the fruit that grows underneath
  • They can make the skin of your fruits less bitter and sweeter
  • The caffeine in the coffee ground helps to stimulate the growth of roots and shoots under the soil
  • Your tomato plants will produce more flowers

Are Coffee Grounds Good For Roses?

Coffee grounds are great for roses. Coffee grounds are a natural fertilizer that can help prevent several garden pests and diseases. The acidity of coffee grounds will help to prevent powdery mildew, black spot, rust, and other diseases in your rose bushes.

Coffee grounds can also help protect against insect damage such as cabbage worms, hornworms, and aphids by repelling them from feeding on your roses. 

The main reason why these insects stay away from the soil is that it has an unpleasant odor to them which is created by lactic acid in the coffee grounds when mixed with water and other organic matter in the soil mixture.

“Watching a plant die can be disheartening, but there are steps you can take to try and save it. Check out our guide on how to save a dying plant for pro tips on how to revive your dying plant and bring it back to life.”

Does The Type Of Coffee Matter For Plant Growth/Health?

Coffee grounds are not a fertilizer, but they are an excellent soil amendment.

Soil amendments come in many forms and can include materials like compost, lime, gypsum, and rock dust. All of these add nutrients to the soil – some do it right away while others take time to become available for plant uptake. 

Coffee grounds are especially great because they help loosen compacted soils and improve drainage so water is absorbed faster into your plants’ roots/stems/trunks/flowers/etc.

Coffee grounds work best on plants that require more acidic soil (like blueberries), but they can also be used on everything from tomatoes to roses with no noticeable damage done as long as you don’t overdo it!

Here are my recommended amounts of coffee per plant:

Are There Any Drawbacks To Using Coffee Grounds As Mulch/Fertilizer?

  • Caffeine is toxic to plants and can cause leaf spots and chlorosis (yellowing of leaves).
  • Caffeine can be toxic to humans.
  • Coffee grounds attract pests such as ants, roaches, mice, rats, and other rodents.
  • Coffee grounds may also attract insects such as slugs or snails if they find a way into your garden. 

These will eat the leaves off of your plants, causing damage. If they don’t make their way into your garden, they could still be attracted by the smell of coffee grounds used as mulch.

Or fertilizer in your yard outside; this means that when you’re not home they’ll start feasting on some of your favorite plants!

There are also side effects that come from using coffee grounds in gardens: * Fungus can develop easily on the surface of wet coffee grounds thanks to its high nitrogen content; this will eventually kill off any plant life nearby if left untreated for too long!

“Composting is an eco-friendly way to dispose of organic waste and can help reduce landfill waste while also providing a nutrient-rich soil amendment. Check out our guide on the benefits of composting for the environment to learn more about this sustainable practice and how it can benefit the environment.”

Are There Other Ways I Can Use My Used Coffee Grains To Help Out In The Garden (Other Than Fertilizer Or Mulch)?

If you’re interested in making your compost, you can use coffee grounds as part of that process. Coffee grounds are highly acidic, but they also contain nitrogen and potassium. 

When composted with other compostable materials like green grass clippings and vegetable scraps, the nutrients from the soil will leach out into the air and mix with your plants’ roots.

Some people even add used coffee grounds directly to their garden beds or pots as a way to break down hard clay soil or improve drainage for sandy soils. 

The soil needs to be laid on top of these grounds so that they can break down over time it’s not a one-time application thing (and it won’t work if you just sprinkle some grounds onto your garden bed).

If you’re looking for ways to create your soil without buying bags at the store (or if you want something more natural), using coffee grounds is an option worth considering!


So, are coffee grounds good for gardeners? It depends on what your goal is. Coffee can be helpful when used as a fertilizer or mulch. However, if you’re looking for a way to repel bugs or attract them, then coffee may not be the best option. 

The next time you have some used coffee grounds lying around and want to try something new with them in your garden or backyard, remember these tips!

Further Reading

For more information on using coffee grounds in gardening, check out the following resources:

How to Use Coffee Grounds in the Garden: This article from HGTV provides tips on using coffee grounds as fertilizer, compost, and pest control.

A Common Sense Guide to Using Coffee Grounds in the Garden: This guide from GrowVeg provides a comprehensive overview of using coffee grounds in gardening, including how to apply them, which plants benefit from them, and potential drawbacks to using them.

Coffee Grounds for Plants: Everything You Need to Know: This article from Reader’s Digest covers the benefits and risks of using coffee grounds as a fertilizer, including tips for applying them to different types of plants.


What are the benefits of using coffee grounds in the garden?

Using coffee grounds in the garden can provide a range of benefits, including adding organic matter to soil, improving soil structure, and providing nutrients to plants.

How do I apply coffee grounds to my garden?

Coffee grounds can be applied directly to the soil around plants, mixed into compost, or used to create a liquid fertilizer.

Are there any risks to using coffee grounds in the garden?

While coffee grounds can provide benefits to plants, there are also potential risks, including acidity levels that can harm certain plants and the risk of mold growth if not used properly.

Which plants benefit the most from coffee grounds?

Plants that prefer acidic soil, such as blueberries, rhododendrons, and azaleas, can benefit the most from coffee grounds. However, coffee grounds can also be beneficial for other plants, including roses, tomatoes, and peppers.

How often should I use coffee grounds in my garden?

The frequency of using coffee grounds in the garden will depend on the specific needs of your plants and soil. As a general rule, it’s best to use coffee grounds sparingly and in moderation, as too much can be harmful to plants.