Save yourself the cost of expensive fertilizers for houseplants from specialist retailers. Bet you already have a nutrient-rich alternative in the house? Coffee grounds should not end up in the trash, but in the plant pot. Here you will find out why plants also share their passion for the aromatic drink.
Why are coffee grounds suitable as fertilizer for houseplants?
Coffee grounds are an ideal fertilizer for houseplants as they contain nutrients such as nitrogen, phosphorus and potassium, regulate the pH of the potting soil and protect against pests. Dry the coffee grounds before use and use 4 to 8 g per plant.
What makes coffee grounds the ideal fertilizer for houseplants?
The advantage of cost savings is obvious. Coffee grounds are produced in every household where coffee is consumed. Since it is avoidably a waste product, there are no additional expenses. But what is the importance of coffee grounds for houseplants?
Coffee grounds contain many nutrients
When the beans are brewed, some of the nutrients contained in the coffee remain in the powder, including:
- Nitrogen: 2%
- Phosphorus: 0.4%
- Potassium: 0.8%
There is also a not insignificant amount of various tannic acids, antioxidants and caffeine. All of these minerals can also be found in conventional products. Plants gain energy from the nutrients and demonstrate stronger growth.
Coffee grounds regulate the pH value of the potting soil
Many plants prefer slightly acidic soil. Thanks to the tannins in coffee, it creates optimal conditions for the right substrate.
Coffee grounds protect against pests
Do you often have ants in your apartment? Coffee grounds are also effective against this. The insects can't stand the smell and run away.
These houseplants enjoy being fertilized with coffee grounds
But be careful, not every houseplant can tolerate such a high nutrient density in the soil. However, you can't go wrong with citrus plants. This type of plant loves acidic soil.
This is what you need to pay attention to
Before you sprinkle the coffee grounds over the substrate, you must dry them well. Otherwise there is a risk of mold. It is best to spread the captured powder on a baking tray and let the air remove the moisture. In addition, you should not just apply the coffee grounds on the surface, but mix them into the substrate. Then the nutrients will work even more effectively. But please don't exaggerate. Coffee grounds serve as support, but do not replace the choice of the appropriate substrate. For houseplants, it is sufficient to apply the alternative fertilizer once in spring and once in autumn. The recommended dose is 4 to 8 g. This amount corresponds to approximately one teaspoon.
