Home Improvement:  Database of articles on all aspects of building and architecture, for hobbyists and professionals alike.  From Gale/Cengage (requires library card).

Gardening, Landscape and Horticulture:  Database of academic journals and magazines focused on practical aspects and scientific theory of horticulture.  From Gale/Cengage (requires library card).

Gardening in Oregon: from the Oregon State Univeristy Extension Service