Must be mixed with water. Comes in a 300-g bottle with an easy-to-use dropper that makes measuring simple. Works great with plants such as African violets, orchids, herbs, gardenias, gloxinias and diffenbachias. With Schultz® All-Purpose Liquid Plant Food 10-15-10, you feed your plants every time you water! Simply add 7 drops (0.53 ml) per litre of water.