One of the primary benefits of coffee grounds is their rich nutritional profile. They contain vital elements like nitrogen, phosphorus, and potassium, along with micronutrients such as magnesium, copper, and calcium. As a slow-release fertilizer, used coffee grounds gradually supply these nutrients to plants, promoting healthy foliage and robust growth. However, it is crucial to use *spent* grounds, as fresh coffee grounds are highly acidic and contain caffeine which can harm plant roots.
