Scientists at The Davey Institute developed Davey Arbor Green PRO to maximize nutrients effect on plants and keep trees and shrubs healthier. The technology of Davey Arbor Green PRO is intended to mimic the natural availability of nutrients in the forest environment.Patented Formulations Inspired By Nature Slow release of nutrients - up to 2 years Microbial release - 66 WIN 3-1-1 nutrient ratio - optimal for woody plants Nutrient holding capacity 3-5 X compared to traditional fertilizers with humate additives Requires 25 less nitrogen than traditional and competitive fertilizers - a green position that also reduces costTree Nutrition Developed by a Tree CompanyThe Davey Difference The Davey Tree Expert Company is the largest and oldest tree care company in the world. Since 1880 we have been taking care of trees for our clients. We have over 300 locations nationwide and a staff of technical experts dedicated to solving tree-related problems.Arbor Green PRO was created by scientists at The Davey Institute who are committed to performance innovation and environmental stewardship. Products like Arbor Green PRO are an example of the next generation tools being developed by Davey to nuture and protect trees and landscapes and enhance the value of properties and overall health of the communities we serve.The World Leader in Tree Nutrition Development First tree nutrition patent in 1978 Patented formulations ongoing Superior performance Lower cost per lb. of nitrogen