Fertilize roses ecologically with coffee grounds and black tea

Fertilize roses ecologically with coffee grounds and black tea

Why coffee and black tea are good fertilizers

Anyone who likes to drink coffee or black tea throws valuable biomaterial into the garbage can every day. Coffee grounds and tea leaves contain plenty of nutrients even after they have been brewed; especially nitrogen, potassium and phosphorus. This valuable treasure should at least be recycled on the compost, but it can also be used directly as a fertilizer. Your roses will thank you! By the way, coffee grounds and tea leaves are equally suitable for fertilization, but coffee has a higher concentration of nutrients.

also read

  • Fertilizing boxwood with coffee grounds - useful or not?
  • When should you fertilize roses?
  • Fertilize roses in autumn? Better not!

Fertilize the roses with coffee grounds

Roses (and of course other garden and potted plants) are very easy to fertilize with coffee:

  • After brewing, get the coffee grounds out of the filter bag, pad, or whatever you're using.
  • Dispose of the waste as usual and
  • Spread the coffee grounds out over a large area on a board or baking sheet.
  • Let the coffee dry.
  • Moist coffee powder should not be used for fertilization as it molds easily.
  • Now fertilize your roses about every four weeks with the dried coffee grounds.
  • Use half a cup to one cup of ground coffee, depending on the size and age of the plant.
  • Work the flour well into the soil.
  • Make sure that roses should no longer be fertilized by the end of June at the latest!

If, on the other hand, you want to fertilize with tea, you do not use the pure tea leaves, but rather water the plants with a strong infusion. You can also work the tea leaves into the soil.

Use banana peels only as additional fertilizer

Banana peels are also good fertilizers, as they contain plenty of minerals and vitamins - especially potassium and phosphorus. However, the pods are not suitable for the sole fertilization of roses, because they lack the nitrogen that is so important for growth. However, you can occasionally work the shredded banana peels into the soil as a healthy supplementary fertilizer. But be careful: If possible, only use organic bananas, because fruits from conventional cultivation have a very high level of pollution.


Fertilizing with coffee grounds not only provides the plants with valuable nutrients and also attracts earthworms, but also lowers the pH value of the soil. However, you can counteract acidification by adding ground eggshells - these mainly consist of lime - to the coffee fertilizer.