Coffee Grounds For Houseplants. Just make sure to limit your coffee quantities as too much caffeine can stunt plant growth and increase the risk of fungal diseases. Your old coffee grounds are a great source of nitrogen a prime nutrient many houseplants require.
The better way to provide some of these nutrients to your houseplants is to pour boiling water over the shells and allow them to steep for at least 24 hours. Unwashed coffee grounds will lower the pH level of your garden raise the acidity which is great for plants that like acidic soil but hurts plants that prefer less acidic soil. In spite of this it would be best if you compost them first.
Your old coffee grounds are a great source of nitrogen a prime nutrient many houseplants require.
In this article Ill walk you through. Yes the coffee grounds can be used in fertilizing houseplants. Many people feel that coffee grounds lower the pH or raise the acid level of soil which is good for acid loving plants. Nitrogen helps to encourage lush leafy growth so using a compost containing coffee grounds amongst your plants will promote foliage health.