7. Hydrangeas (Hydrangea spp.)
Coffee grounds can influence the color of hydrangea blooms by lowering soil pH. Acidic soil helps hydrangeas turn blue, making them an excellent choice for gardeners who want to adjust flower color naturally.
8. Camellias (Camellia spp.)
Camellias thrive in acidic soil, and coffee grounds provide essential nutrients while maintaining the right pH. Apply coffee grounds as mulch or mix them into the soil for best results.
9. Rhododendrons (Rhododendron spp.)
Like azaleas, rhododendrons prefer slightly acidic soil. Coffee grounds help these shrubs absorb iron, which is essential for vibrant green leaves and abundant flowers.
10. Peppers (Capsicum spp.)
Peppers need nitrogen-rich soil for healthy growth. Adding coffee grounds to the compost or soil mix can provide a boost to pepper plants, leading to larger and more flavorful fruits.
11. Ferns (Various species)
Ferns prefer rich, moist soil with high organic matter. Coffee grounds help retain moisture and provide slow-release nutrients that keep ferns lush and green.
12. Citrus Trees (Citrus spp.)
Citrus trees, such as lemon, orange, and lime, appreciate the nitrogen from coffee grounds. Sprinkle used grounds around the base of the tree to promote healthy leaves and fruit production.
