An organic fertilizer such as fish emulsion that can be sprayed on a lawn is best because it includes trace minerals and can be found in formulas enhanced with phosphorous and potassium. Liquid fertilizers that come in ready to use sprayers are convenient, but high priced.
About this Author
Over the past 30 years, Mara Grey has sold plants in nurseries, designed gardens and volunteered as a Master Gardener. She is the author of "The Lazy Gardener" and "The Complete Idiot's Guide to Flower Gardening" and has a Bachelor of Science in botany.