Coffee Ground For Indoor Plants. It doesnt take long to see that coffee is touted as the panacea of the garden. When used as a plant fertilizer coffee grounds can replenish the soil acidity that is often lost in potted and in-ground plants.
Half a cup of coffee grounds mixed in a gallon of water makes a great liquid fertilizer for your plants whether they grow in the garden or in pots. Put coffee grounds in your compost for healthy soil and earthworms. Grow HUGE plants with coffee grounds.
Marino says typically only the latter.
Coffee grounds ward off slugs. Coffee grounds ward off slugs. For example you can combine coffee grounds with soil compost or fertilizer. Half a cup of coffee grounds mixed in a gallon of water makes a great liquid fertilizer for your plants whether they grow in the garden or in pots.