While used coffee grounds are only slightly acidic, fresh (unbrewed) coffee grounds have more acid. Your acid-loving plants like hydrangeas, rhododendrons, azaleas, lily of the valley, blueberries, carrots, and radishes can get a boost from fresh grounds. What plants can I put coffee grounds on? The plants that like coffee grounds include roses, blueberries, azaleas, … Read more
In most cases, the grounds are too acidic to be used directly on soil, even for acid-loving plants like blueberries, azaleas and hollies. Coffee grounds inhibit the growth of some plants, including geranium, asparagus fern, Chinese mustard and Italian ryegrass Which plants do not like coffee grounds? In most cases, the grounds are too acidic … Read more
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. Why you shouldn’t use coffee grounds? But are coffee grounds really all … Read more