Wednesday, November 12, 2025 - Used Coffee Grounds in the Garden
Used coffee grounds can be used in the garden as a fertilizer, compost ingredient, and soil amendment to improve drainage and add nutrients like nitrogen, potassium, and phosphorus. They can also help deter some pests and are a favourite of earthworms.
How to use coffee grounds in the garden
· Compost: Add used coffee grounds to your compost bin. They are considered a "green" or nitrogen-rich material, so balance them with carbon-rich "browns" like dried leaves and newspaper.
· Fertilizer: Sprinkle a thin layer on the soil surface and gently work them in. This is best for acid-loving plants like blueberries, azaleas, and hydrangeas.
· Soil conditioner: Work coffee grounds into the soil to improve its structure, drainage, and aeration.
· Attract earthworms: Earthworms are attracted to coffee grounds, and their activity helps to aerate and improve the soil.
· Pest control: The grounds can help repel some pests like slugs, but they don't have enough caffeine to act as an effective insecticide.
