Great collection of urban gardening resources from North Carolina State University. Some of it is regional, but much of it should translate to other locales. Here are just some highlights:
- Plant Profiles: Fact sheets on common plants
- Plant Care: Information leaflets on fruit, vegetables, home propagation, etc.
- How To: Variety of AG publications
- Horticulture on the Internet: Extensive directory of sites and pages, organized by topic