Can I spread coffee grounds at the bases of trees and shrubs to add nitrogen to the soil?” asks Ken Long of Middletown, Ohio.
You’ve probably heard of local cafés saving their coffee grounds for community gardens. It’s true to a point, but you still need to know what you’re doing.
Do coffee grounds make your soil richer? Coffee grounds can successfully be used in indoor and outdoor gardens, but moderation is key. Avoid applying large quantities of fresh grounds to the soil. This can temporarily tie up soil nutrients. Plus, coffee contains allelopathic chemicals that inhibit the growth of certain plants.
The best place for coffee grounds is the compost pile. Composting grounds as a first step eliminates both issues while allowing you to recycle your morning grounds into a wonderful soil amendment.
Article source here: Should You Use Coffee Grounds in the Garden?
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