Water-soluble Fertilizer is a type of fertilizer that can apply in the form of a water solution. Unlike the granular based fertilizer that the farmers are generally apply to the field, it is free-flowing tiny particles that dissolve in the water quickly. The plants will be absorbed easily, and its effect will seen in a few days. You must keep in mind that the water in which water-soluble fertilizer will dissolved must be neutral (pH must keep between 6.5 and 7.5). Five (05) gram is enough for per litre of water. If you add more quantity in a water, the plants will be adversely affected. Don't apply the rest of the water on the same plants again and again. It also affects the plants badly.