PRT operates a diverse network of 19 nurseries in Canada and the United States enabling us to grow a wide variety of high-qua ... lity container forest seedlings for all climatic and site conditions. Annual production of 320 million seedlings makes PRT the largest producer of containerized forest seedlings in North America. We produce trees for customers from British Columbia to Ontario and Michigan to Alabama. PRT is Canada’s largest forest nursery company and the largest producer of container grown forest seedlings in North America. PRT was formed in 1988 and has grown more than three billion forest seedlings. Trusted to grow™ read more