What Houseplants Like Coffee Grounds

Give coffee-infused water twice weekly to your Christmas cactus. It will support the plant’s growth and help with flowering when combined with enough light.

Which plants are resistant to coffee grounds?

We understand that it feels nice to use your leftover morning coffee instead of putting it in the trash. The gardeners who write about it aren’t mistaken when they claim that it’s rich in elements that are good for the soil, such nitrogen, which is crucial for plant growth. Adding organic matter to your garden’s soil is generally a good idea because bacteria will eat it up and break it down into more nutrients the plants can consume.

However, even proponents of coffee-ground gardening express a few words of caution. They point out that because coffee grounds are so acidic, they should only be used for plants that also enjoy acidity, such as azaleas and blueberries. Additionally, the additional nitrogen boost from coffee grounds may slow the growth of fruits and flowers if your soil already contains a lot of nitrogen. These cautions, however, fail to mention one significant issue with used coffee grounds: the presence of caffeine.

How can coffee grounds be used to a potted plant?

The final component of the puzzle is understanding how to use your property. According to Marino, putting too much coffee grinds with plants is the biggest error people make. Only in moderation, she advises, are the additional nitrogen and potassium found in coffee grounds beneficial. You should significantly dilute it and only use a little bit of it.

The easiest approach to use coffee grounds for plants, according to Marino, is to add them to your compost pile and then include a small amount of that compost into your potting soil. Coffee grinds can be diluted in the same way as fertilizer is diluted: one teaspoon of coffee grounds per gallon of water. Marino suggests doing this in a small container and swirling the mixture with a spoon until it is completely diluted. Run the mixture through water using a cheesecloth or strainer after doing this for a number of nights, she advises.

According to Marino, using a little bit of the grounds per plant also makes it possible to observe how the plant is responding to it. She describes it as “only a little baby step.” “You can add more coffee grinds if it appears to be genuinely promoting the growth of your plant. But you’ll be able to tell to cut back if it seems to be having the opposite effect.”

Utilized coffee grounds can also be used as mulch in addition to as fertilizer. In fact, some claim that since coffee is harmful to slugs, adding coffee grounds to your mulch will help keep them away. There is some indication that earthworms are drawn to coffee grounds as well. Because they assist in better integrating organic materials into the soil, earthworms are good for the health of the soil and water infiltration.

As with traditional fertilizer, Marino advises considering seasonal variations regardless of whether you’re using coffee grinds as mulch or fertilizer. During the growth seasons, she explains, “this is going to be the optimum time to put coffee grinds in your fertilizer, much like we fertilize with store-bought fertilizer in the spring and summer.” I advise avoiding using them in the winter when plants are dormant and only using them during this time period.

If you have cats, Marino advises using a small amount of coffee grounds on the plants from the list of ones that enjoy them to prevent them from nibbling your young plants. I’ve heard anecdotally from multiple people that using coffee grinds to repel cats off plants works incredibly well, she exclaims.

It is obvious that employing coffee grounds to aid plant growth is complicated and by no means a guarantee. But it can be a terrific strategy to reduce waste if you’re aiming to live your best, sustainable life. Just stick to the listed plants, take it gradually at first, and monitor your progress. It’s possible that you won’t be the only coffee enthusiast in your home.

Are coffee grounds palatable to spider plants?

The spider plant benefits from occasional watering with dilute coffee, which helps them achieve their ideal soil pH of 6.1 to 6.5. One part coffee to three parts water is the suggested ratio for coffee and water.

Can I sprinkle coffee grounds on every plant I own?

James Gray, the owner of Barista & Co., claims he always uses coffee grounds as fertilizer (opens in new tab). Giving your plants the grounds that can’t fit in the sink is an excellent way to reduce waste, according to this statement.

To use coffee compost, Lewis Spencer continues, “just sprinkle the grinds directly into your soil and carefully rake it in. Coffee grounds give organic matter to the soil, aiding in drainage, aeration, and water retention.

“Leftover diluted coffee can also be made into a liquid fertilizer for plants.” Simply combine five gallons of water and two cups of freshly brewed coffee grounds in a bucket and leave it overnight.

What kinds of plants benefit from coffee grounds?

Fresh (unbrewed) coffee grounds are more acidic than used coffee grounds, which are only slightly acidic. Fresh grounds can benefit your acid-loving plants, including hydrangeas, rhododendrons, azaleas, lily of the valley, blueberries, carrots, and radishes. However, avoid planting tomatoes in that part of the garden because they dislike freshly ground coffee. If you have coffee in your cupboard that is starting to go bad or that you bought for friends who were coming to town but isn’t your typical cup of joe, you may use it for this.

Most of the caffeine and acid in freshly ground coffee are still present. Coffee grounds shouldn’t be applied to seedlings or very young plants because the caffeine may hinder their growth. Use caution when working with new surfaces around animals to prevent your wire terrier from being overly wired.

How frequently should coffee grounds be applied to houseplants?

For your houseplants, coffee can kind of be a double-edged sword. After reading thus far, the advantages are quite clear, but you’ve also learned that coffee’s caffeine can be harmful to some acid-loving plants.

That hasn’t even touched on the consequences of feeding coffee to an alkaline plant. It would probably pass away rather shortly.

I put together this useful list of dos and don’ts to help you remember all the guidelines for using coffee grounds. To guarantee you do it securely, keep it in mind next time you give your houseplants coffee!

DO Use Coffee Grounds Seldomly

You need coffee to function every day, but your houseplants? They don’t rely on the things nearly as much as you do. Giving them coffee is not something you do every day. Leave it as a special treat just occasionally.

If you’re using coffee as fertilizer, be sure to fertilize according to your houseplant’s regular timetable. Depending on the plant and the season, that can need fertilizing every six weeks.

When beginning a new compost pile, you can incorporate a little amount of coffee grinds into the mixture. Sprinkle coffee grounds as a pest control strategy when the bugs start to appear, but stay away from it otherwise.

Only water your houseplant once every two to three weeks with liquid coffee.

What occurs if coffee is poured on a plant?

Despite the fact that we humans depend on coffee to get us up every morning, not everyone is a morning person, okay?

We don’t understand that the plants all around us could benefit from a caffeine boost as well.

Evidently, coffee is an excellent source of nitrogen, and plants like blueberries, azaleas, and rhododendrons, which prefer more acidic soil, can benefit from specific quantities of nitrogen. If you intend to do this, The Spruce advises that you keep a close check on your plant. If you’re “watering” the plant with coffee and you see that the leaves are beginning to yellow or brown around the margins, the liquid coffee may be providing too much acid to the soil. Watering down your coffee before pouring it on your plant might be a solution.

Another reminder: Make sure the coffee you use to hydrate your plant is black. Even though it might seem apparent, spilling leftover brew that contains sugars or dairy may draw insects like gnats. You should limit yourself to doing this only once a week, even if you’re just using black coffee.

Coffee benefits your plants in more ways than just what’s left in the pot.

Your developing green buddies can also profit from the leftover grounds by using them as compost or fertilizer.

By adding coffee grounds to the soil around your plants, you may keep pests like cats and rabbits out while also providing a moderate acid fertilizer that prevents slugs from developing.

For those of you who prefer one or two cups (or three or four) a day, this handy tip may significantly reduce the amount of wasted coffee.

Can leftover coffee be used on indoor plants?

If you make coffee by the pot, you might be curious about whether you can water plants with the cold leftovers. Or, can you put that half-cup of cold coffee in your mug next to your desk in that potted pothos plant?

The quick response is: perhaps. According to the plant. African violets, Impatiens, Norfolk Island pines, Phalaenopsis orchids, and Dieffenbachia are a few examples of plants that seem to benefit from a weekly coffee watering. Other plants that seem to benefit include Impatiens and Impatiens. If you occasionally water acid-loving plants outside, such as azaleas, Rhododendrons, Siberian iris, lupine, and any pine trees or shrubs, with cold coffee, they will thrive. Additionally, liquid coffee can be utilized to moisten an overly dry compost pile.

Keep a tight eye on your plant if you decide to experiment with coffee watering indoor plants. A clue that the coffee is making the soil excessively acidic is when the leaves begin to yellow or the tips of the leaves begin to turn brown. If you like your daily cup of java on the strong side, it’s not a terrible idea to dilute it with water. When leftover coffee is dumped into the soil to “water” plants, they frequently flourish in some offices.

One warning: don’t pour cream, milk, or sugar from your coffee into your plants. Likewise with flavored coffees. Sugars and fats can cause a nasty mess in addition to harming your plants and luring bugs. Coffee that has been sweetened or flavor-infused may rapidly cause fungus gnats or pungent house ants to take over a plant.

Absolutely! The carafe’s leftover coffee can be used to water both indoor and outdoor plants. They will be fertilized by the nitrogen found in leftover coffee. However, avoid spilling cream- or sugar-sweetened coffee on plants because it could damage them and draw pests like ants.

Only once a week should you use coffee to water plants. Coffee from the carafe leftovers should be stored in another container and used every week.

Coffee grounds are a good fertilizer for both soil and plants. Simply scatter the coffee grinds on the ground near the plants. Some acid-loving plants, like azaleas and blueberries, benefit from the use of coffee grounds, but others, like tomatoes, do not.

Succulents enjoy coffee grounds, right?

Succulents benefit from the use of coffee grinds in their growth and development. Additionally, it will improve the soil’s richness.

When coffee grounds are added to succulent soil, both drainage and aeration are improved. Additionally, it raises the amount of organic matter in the soil, which improves the availability of nitrogen while giving the succulent the nutrients and minerals it needs for a healthy growth.

Nitrogen is crucial for the growth of the plant and coffee grinds will increase the production of it.

More factors, such as type, quantity, brewed or unbrewed coffee, and other topics covered in this article, should be taken into account when using coffee grinds on succulents.

Do coffee grounds work in a peace lily?

The numerous kinds of DIY fertilizers and composts you can use for your indoor plants have been the subject of a lot of my recent writing. Making your own is especially advantageous because you can make sure your plant receives the precise ratio of nutrients it requires. Additionally, I support making things at home because they might be less expensive than items from stores and they are enjoyable to do.

Coffee grinds have long been a suitable option for naturally enhancing houseplants, including peace lilies. Allow me to explain if you’ve ever wondered why it is.


The nitrogen in your used coffee grounds is an excellent source of this essential nutrient for many indoor plants. Particularly peace lilies benefit from a combination of nitrogen, phosphorus, and potassium. Although you could always use fertilizer made commercially, why not try using coffee grounds instead if you have any on hand?

Organic Matter

Coffee grounds give your peace lily’s soil organic ingredients in addition to its nutrient value. Aeration, water retention, and drainage can all be significantly improved by adding organic matter to the soil where your peace lily is growing.


Knowing the difference is important because some houseplants can thrive in more acidic soil while others will perish. Higher alkalinity soils exhibit the same characteristics.

Not all coffee grounds work, despite the fact that they can often increase the acidity of your peace lily. The coffee grinds must be added without being cleaned because of their greater acidity.

Also, don’t wait several days to throw the grounds into the soil; do it immediately (or weeks). The more acidic they are, the fresher they are.

Peace lilies prefer an acidic soil with a pH between 5.8 and 6.5. (as is anything under 7.0).

Therefore, coffee grounds are perfect for your peace lily.


Did you know that some microbes, like earthworms, can be beneficial to your houseplant? It is real!

As the organic debris begins to rot, they will eat it. Even better, the earthworms help aerate the soil around your peace lily as they move around and wiggle through it.

If you don’t really want to, you don’t have to search your yard for earthworms to bury in the soil of your plants. You should be able to attract earthworms to your indoor garden with just a small amount of compost that comprises organic materials and leaf litter.

I’ve stated it before, but some indoor gardeners don’t like the notion of having live bugs crawling around in the plant soil inside their house. That is more than acceptable if you are in the same situation.

Earthworms are obviously optional for your peace lily, and there are many of alternatives. However, if you can tolerate them, they can be very beneficial. Your plants will appreciate it!