GreenTree Agroforestry Solutions located in Regina, Saskatchewan provides professional agroforestry and tree related consulting services through its founder Bill Schroeder. 

Until his retirement in 2016, Bill Schroeder was an agroforestry scientist with the Agriculture and Agri-Food Canada Agroforestry Development Centre at Indian Head, Saskatchewan. With expertise in tree genetics, nursery propagation and agroforestry, he made substantial science contributions to hardy woody plants and agroforestry systems.

During his 35 year career Bill was a world leader in breeding woody plants for agroforestry systems. The influence of his research can be seen daily in the thousands of farmstead and field shelterbelts planted throughout western Canada. His research developing improved tree and shrub species for cold temperate regions has been instrumental in the agroforestry there.