Is Coffee Grounds Good For Your Tomato Plants. The used coffee grounds will also help microorganisms beneficial to plant growth thrive as well as attract earthworms. Related Literature As fertilizer used coffee grounds are slightly acidic and full of nitrogen a mineral that aids vegetable and plant growth.
This is total crap. One or two slugs may turn away from the coffee barrier but there are bound to be pests that decide its a good idea to jump the makeshift fence. The ability to use the natural effects of coffee grounds is preferable to using something toxic on your garden especially if you are growing food in your garden.
Many people feel that coffee grounds lower the pH or raise the acid level of soil which is good for acid loving plants.
Coffee grounds contain carbon nitrogen and other compounds that feed soil organisms. Used coffee grounds make some of the best fertilizer around. It is particularly disappointing when you try to help feed your plants and promote their health only to cause them a fungal disease which can do a lot of harm. Using coffee grounds to grow healthy tomatoes is a smart idea for several reasons.