Are coffee grounds good for amaryllis?
Diluted coffee is an effective—and organic—fertilizer for healthier-looking houseplants. African violets, azaleas, amaryllis, aloe and ferns, to name a few, are all indoor plants that love coffee. Water retention. Amending soil with coffee grounds improves water retention, enhancing the health of moisture-loving plants such as bleeding heart, canna lily, cardinal flower, hosta, primrose, and spiderwort. Avoid using grounds in waterwise landscapes or around low water plants.However, there are some plants that you should avoid using coffee grounds on. Plants that prefer alkaline soil, like lavender and lilacs, can be harmed by the acidity of coffee grounds. Plants that are sensitive to caffeine, such as geraniums and some herbs, can also be affected by the presence of coffee grounds.