Your garden benefits from the addition of extra nutrients from time to time. Garden food products come in two forms - liquid or granule - and dedicated garden sprayers or fertilizer spreaders are available to make the job more efficient. A sprayer can be as simple as a bottle with a squeeze handle or as mighty as a tank with tube and spray handle attachment. Your choice will depend on the size of the area you're treating. Either of these sprayer types come in an enormous variety of styles and can also be used as pesticide sprayers if you have an infestation of insects that can cause adverse effects on your plants.