Established in 2003, Gaia College offers curriculum in organic land care. Thy have a large range of courses available for home gardeners, landscapers, small food growers, and municipalities and developers
Royal Roads University offers a range of online courses in ecological landscape design, growing food, organic master gardening, rainwater harvesting and management, etc.
The Horticulture Centre of the Pacific (HCP) hosts great Community Education workshops for everyone, from landscape professionals to hobbyist gardeners.
Oregon State University offers a Master Gardener short course series that you can take on demand and access at any time. While most courses are $45, they offer a free Introduction to Urban Agriculture Course