Coffee Good For Houseplants. Of course you wouldnt want to use the cup sitting in front of you. If the foliage starts yellowing or the tips of the leaves start turning brown its a sign that the coffee is adding too much acidity to the soil.
Theyll appreciate the additional nutrients as well as the water. Diluting coffee grounds works. Houseplants like Philodendrons Jade Plants Christmas Cacti Cyclamen and African Violets grow best with the use of coffee grounds.
Coffee grounds and brewed coffee are a source of nitrogen for plants which is the nutrient that produces healthy green growth and strong stems.
Coffee grounds are also packed with nutrients that can nourish plants and deter pests in your garden. Its not a bad idea to dilute your coffee with water especially if you prefer your daily cup of java on the strong side. Theyll appreciate the additional nutrients as well as the water. You have to consider the soils pH and the effect the fertilizer will have on it.