My houseplants and I have something in common, we both love coffee! I give left-over coffee to our houseplants, and they love it! It’s the number 1 thing I do with leftover coffee, and it has nothing to do with me drinking it!
Yes! Diluted coffee is an all-natural fertilizer for houseplants.
Do you always have leftover coffee sitting in the coffee maker? Or, are you like me, who orders a grande iced coffee and somehow leaves it on my desk, and then I find it the next morning feeling guilty for wasting $6!? I had no idea that my leftover brewed coffee was valuable fertilizer for houseplants such as your Fiddle Leaf Fig plants, Spider Plants, Snake Plants, Pothos, Philodendrons, Monsteras, Peace Lilies, and more!!
Did you know you can use your leftover coffee when watering your houseplants for extra nutrients? It’s True! Leftover coffee can be used as an organic natural fertilizer for most houseplants, and I highly recommend it! Just dilute it and use it! Diluting brewed coffee and adding it to the plants’ soil is way better than directly adding coffee grounds to the soil.
Thank You Dallas for sharing this on Instagram! I love it when my readers share their results on social media with me!
I started watering my houseplants with diluted leftover coffee a few years ago, and they went from happy to absolutely thriving!
I got the idea because I was curious about how the coffee grounds contributed to our compost pile in the backyard. I throw as much as possible in our prairie area, and what doesn’t get eaten by the rabbits has helped with the growth of wildflowers and other native Wisconsin plants.
I researched and found that coffee grounds are a great source of nitrogen for your soil. Nitrogen is important for houseplants because it helps them produce more leaves & stronger stems. I wanted to figure out a way to bring the same amazing nutrients I put outdoors inside for my houseplants. So, I decided to try using leftover coffee.
Now here is the important part! I do not use coffee grounds for my houseplants. I use diluted coffee. I do not use coffee grounds inside on my houseplants because the grounds retain too much moisture and often will start to grow mold.
Coffee contains small amounts of calcium and magnesium which are great for houseplants. I am so happy that I found this inexpensive natural fertilizer. You may be asking, do you just pour the coffee directly into your houseplants? Nope! I dilute it and I make sure it is at room temperature before giving it to my plants.
My golden ration mixture is 1 Part Coffee to 5 Parts Water.
Drip coffee can potentially be pretty acidic which can potentially be dangerous for your houseplants. The diluted coffee should be the color of a weak or watered-down iced tea. Be sure to wait until the coffee has cooled so that you do not burn or shock your houseplants.
I water my plants with diluted coffee about once or twice a week during the summer and once every 2 weeks during the winter or slow-growing months. My Fiddle Leaf Fig has been growing lush new leaves like crazy since I started the coffee watering regiment. I have my Fiddle Leaf Fig in our sunporch which gets primarily West-facing sunlight. I give coffee to my Varigated Rubber Tree, too! I bought it from a houseplant seller in California, and the diluted coffee really helped it “perk” up after its trip via USPS all the way to Wisconsin!
All-Natural Coffee Fertilizer for Houseplants
- Measuring cup
- 5 cups Room Temperature Water
- 1 cup Room Temperature Brewed Drip Coffee flavored blends are OK. decaf is OK.
- Make sure your brewed coffee is at room temperature and add water to dilute.
- Water your plants with this homemade diluted coffee houseplant fertilizer once every two weeks.
- Watch your plants grow!
- Decaf and full caffeinated coffee will work great! It’s not the caffeine that helps the plants thrive, it’s the nitrogen and other micronutrients.
- If your houseplant’s leaves become brown at the edges after the coffee fertilizer application, then either refrain from using as much coffee next time or skip it altogether.
Which Houseplants Like Coffee Fertilizer?
I use the diluted coffee fertilizer on my ficus, rubber trees, umbrella tree, oxalis dwarf umbrella plants, lilies, ferns, monsteras, spider plants, snake plants, pothos (all varieties), and my fiddle leaf figs. I do not use it on my cacti, succulents, or calathea because I am worried about over-watering them because I live in the Midwest and I just feel more comfortable not watering them with the coffee fertilizer – but, if you see below in the comments there are a few plant owners that have used coffee for their succulents with great success!
Are coffee grounds for houseplants good for indoor plants?
Coffee grounds can be beneficial for indoor plants because of their high levels of nitrogen micronutrients, and relatively high water retention But, because they retain water so well, when used in the home with houseplants it can easily cause the top layer of soil to grow mold. That is why I use coffee grounds outdoors in my garden and in my compost pile, and only use diluted coffee for my indoor houseplants.
I also use the coffee fertilizer in our container garden, veggie and herbs, and our raised planter garden in the summer. Keep in mind that the use of coffee grounds increases the moisture content in the soil, which is why is good for vegetation that thrives in moist ground Feel free to ask questions in the comment section below! Have you given your houseplants coffee? Did you notice a difference?
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