Does Coffee Grounds Help Houseplants Grow. You can grow them blue with an infusion of coffee-ground fertilizer. Grow HUGE plants with coffee grounds.
Therefore it is obvious that by you adding coffee grounds to your cactus you will put it under unnecessary challenges. Clearly using coffee grounds to help your plants grow is tricky. Coffee grounds are a good source of nitrogen encourage the growth of the beneficial microorganisms in the soil and help plants that prefer acidic growing medium.
Coffee grounds act as a natural fertilizer for plants.
As a fertilizer used coffee grounds are slightly acidic and full of nitrogen a mineral that aids vegetable and plant growth. Coffee grounds are highly acidic they note so they should be reserved for acid-loving plants like azaleas and blueberries. Coffee plants produce caffeine as a competition mechanism. But those warnings ignore one big problem with spent coffee grounds.