Are old coffee grounds good for houseplants?
Sarah Oconnell
Published Apr 11, 2026
Houseplants are usually favored for their foliage. That means high levels of nitrogen in the soil are essential to maintaining their leafy lushness. Coffee grounds, when used correctly, can be a great source of nitrogen to help your houseplants grow quickly and maintain their lovely leaves.
Which plants do not like used coffee grounds?
Common GroundsBut even coffee-ground gardening advocates include a few words of warning. Coffee grounds are highly acidic, they note, so they should be reserved for acid-loving plants like azaleas and blueberries.
Can I put used coffee grounds on my houseplants?
Yes, coffee grounds are beneficial for indoor plants! This rich organic material is good for your plants due to its high nitrogen content, micronutrients, and high-water retention. The absolute best way to use coffee grounds on your houseplants is to compost!Can I pour old coffee on my plants?
Absolutely! Coffee that is leftover in the carafe can be poured on indoor and outdoor plants. Leftover coffee is a source of nitrogen and will fertilize them. Do not put coffee that has cream or sugar added on plants though, as it can harm the plant and will also attract ants and other insects.Can you use old coffee grounds as potting soil?
Instead of buying plant food for fertilizing your houseplants, try amending ordinary potting soil with Epsom salt and coffee grounds. Epsom salt supplies magnesium and lowers the pH of potting soil, making it easier for plants to absorb other nutrients. Coffee grounds help plants absorb nitrogen.Are Coffee Grounds Good to Use on Houseplants? / Viewer Inspired
How much coffee do you put in potting soil?
It is never a good idea to add too much, as that could do more harm than good. The proper proportion is usually around 4 to 1, or twenty-five percent of coffee grounds to mineral soils by volume. There is no need to use a measuring cup, just be careful not to sprinkle in too much.How often should I put coffee grounds on my plants?
If you practise vermi-composting with a worm bin, coffee grounds are a must as worms love them. For a small bin, add a cup of grounds per week to feed their addiction. Avoid adding too much at once because the acidity could negatively impact your worms. Paper coffee filters can even go in too.How do you use coffee grounds in a potted plant?
"The best way to use coffee grounds for plants is adding it to your compost pile, and then mixing a little bit of that compost in with your potting soil," Marino says. Diluting coffee grounds works the same way as diluting fertilizer: using just a teaspoon of coffee grounds per gallon of water.What can you do with old coffee grounds?
16 Creative Ways to Use Old Coffee Grounds
- Fertilize Your Garden. Most soil does not contain the essential nutrients needed for optimal plant growth. ...
- Compost It for Later. ...
- Repel Insects and Pests. ...
- Remove Fleas from Your Pet. ...
- Neutralize Odors. ...
- Use It as a Natural Cleaning Scrub. ...
- Scour Your Pots and Pans. ...
- Exfoliate Your Skin.
Should I water my plants with coffee?
Yes, coffee contains nitrogen, but in small amounts that are unlikely to make much of a difference to either your best indoor plants or your garden borders. If you do decide to occasionally use coffee to water your plants, make sure it's black, without any sugar or milk added.Is coffee good for all plants?
Apparently, coffee is a great source of nitrogen, and plants that enjoy more acidic soil can benefit from certain levels of nitrogen, like blueberries, azaleas, and rhododendrons. According to The Spruce, if you plan on doing this, you'll need to keep a close eye on your plant.Will moldy coffee grounds hurt plants?
The general consensus among the gardening community is that no harm will come to you when handling the type of fungi that make use of coffee grounds, and that it is just a natural step in the process of decomposition.Are eggshells good for indoor plants?
Eggshell Powder as All-Natural Plant FertilizerYou can simply add crushed eggshells in or on the soil as a natural way of providing your indoor plants with extra calcium. What is this? Another advantage is that the eggshells will also help to aerate the soil. This makes it easier for your plants' roots to grow.
What houseplants do well with coffee grounds?
Houseplants that Love Coffee
- Christmas Cactus. Botanical Name: Schlumbergera bridgesii. ...
- Pothos. Botanical Name: Epipremnum aureum. ...
- Philodendron. Botanical Name: Philodendron. ...
- African Violet. Botanical Name: Saintpaulia spp. ...
- Cyclamen. Botanical Name: Cyclamen persicum. ...
- Miniature Roses. Botanical Name: Rosa. ...
- Jade Plant. ...
- Snake Plant.