Soluble fertilizers

Soluble fertilizers are sold as concentrated liquids or solids formulated to be diluted with water, and some are intended to be applied directly to the foliage. Nutrients in this form become available quickly to the plant and are used to augment plant growth for immediate response or correct a deficiency. This very useful type of fertilizer is relatively low cost and most often used in tandem with a slow-release type of fertilizer.