Two forms of fertilizers exist on the market today: solid and liquid. There is such a thing as applying too much fertilizer, as over-fertilizing can burn and kill plants. Solid fertilizers come in a more concentrated form and are less likely to be washed away by frequent rainfall, but it is easier to burn plants with them. Liquid fertilizer affects plants quickly and is easy to apply evenly, thus reducing the chance of burning plants. Unlike solid fertilizers, liquid fertilizers are in a concentrated form and are meant to be diluted with water before use. This can be beneficial if shipping is an issue.
If your liquid fertilizer does not include a sprayer, pour the liquid fertilizer into a liquid fertilizer hose sprayer and close tightly.
Insert your hose into either the sprayer that is attached to the liquid fertilizer bottle, if there is one, or the separate liquid fertilizer hose sprayer.
Turn on the hose's water.
Spray an even coat of liquid fertilizer on the plants that you wish to fertilize.