Ferti-Lome Acid Loving Water Soluble Plant Food 31-11-11 is a highly concentrated plant food for acid loving plants that provides the nutrients plants need to grow lush and green. This product must be dissolved in water before use and should be used each time you water your acid loving plant like Rhododendrons, Camellias, and Azaleas for maximum benefit. Apply as a foliar spray or a soil drench, but achieves the best results when used both applications are used in combination. You can add fungicides and insecticides to the diluted solution to protect the plants while feeding them.