Ronald from Prescott, Az writes
Looking for a gentle general purpose water soluble fertilizer, ie. 7-4-4 for clay conditions and a variety of trees and shrubs in Prescott Arizona.
The Peters Professional 20-20-20 General Purpose Fertilizer is a water-soluble fertilizer that can be used in irrigation systems. The next lightest option we have is Peters Excel 15-5-15. The fertilizers we currently have with lower analyses will be natural or organic fertilizers that cannot be used in irrigation systems, unfortunately.
Answer last updated on: 02/16/2022