The best fertilizer for hay is any type of fertilizer with a high percentage of nitrogen, which promotes leaf growth. Manure is a good choice, because it is relatively inexpensive, but over time excess phosphorous and potassium will likely be applied. Urea also is a good choice, because it consists almost exclusively of nitrogen (46-0-0).
About this Author
Thomas K. Arnold is the publisher and editorial director of Home Media Magazine and a regular contributor on entertainment to "USA Today", "The Hollywood Reporter," "San Diego Magazine" and other publications.
An alumnus of San Diego State University, Arnold has appeared on such TV shows as "CNN", "E! Entertainment" and "G4's Attack of the Show" to discuss home entertainment and technology issues.