Certified GKH Gardening Expert
The staff of Gardening Know How is located across the U.S. and overseas. They work from home and communicate with each other via a network program. New hires are credentialed and must pass testing before hired. GKH is not affiliated with a university per se, but they are proponents of the University extension service and defer to their expertise often. They also recommend soil tests via extension service and for definitive answers regarding plant disease.