The plants that like coffee grounds include roses, blueberries, azaleas, carrots, radishes, rhododendrons, hydrangeas, cabbage, lilies, and hollies. These are all acid-loving plants that grow best in acidic soil. You'll want to avoid using coffee grounds on plants like tomatoes, clovers, and alfalfa.

What plants are coffee grounds not good for?

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.

What plants are watered with coffee?

Outdoors, acid-loving plants like azaleas, Rhododendron, Siberian iris, lupine, and any pine trees or shrubs will do fine with if periodically watered with cold coffee. Liquid coffee can also be used to water a compost pile that has become too dry.