Are Used Coffee Grounds Good For Orchids

You can safely use coffee grounds up to 20% of total compost volume. ... Coffee grounds will not permanently acidify garden soil as do peat moss or sulfur-based additives; they'll only affect the acidity in the immediate area they're added to, not the larger, surrounding areas.Coffee grounds are highly acidic, they note, so they should be reserved for acid-loving plants like azaleas and blueberries. And if your soil is already high in nitrogen, the extra boost from coffee grounds could stunt the growth of fruits and flowers.To acidify soil, start by scooping up some of the soil in your hands to see if it's loose or compacted. If it's loose, mix some organic material into the soil to acidify it, like compost, manure, or sphagnum peat moss. If the soil is compacted, mix elemental sulfur or iron sulfate into it to make it more acidic.In the Garden - Coffee grounds have several uses in the garden. They are very acidic and when spread over flower beds of plants that thrive on acid such as hydrangeas, and azaleas, it helps to create beautiful, healthy plants. Coffee grounds can also give seedlings a much needed boost of nitrogen.