English Gardening School
Offers short courses, diploma courses, and distance learning courses on gardening involving a wide variety of subjects.
Home and Garden Extension Center
The University of Connecticut offers an educational outreach program that includes gardening, home and garden fact sheets, and soil test facts, and soil test information.
Institute of Gardening
Serves the needs and interests of those who seek to become horticulturists. Provides full-time practicing horticulturalist tutors.
Master Gardener Online
Comprehensive basic gardening training from the Oregon State University Extended Campus.