Plant Select
- Database of plants suitable for the Rocky Mountain region, including lists of retailers. Also lists demonstration gardens in Colorado.
- http://www.plantselect.org/

Growing Gardens of Boulder County, Colorado
- Non-profit organization provides a place of contact to create multi-cultural and multi-generational community through gardening.
- http://www.growinggardens.org/

Colorado State Garden Publications
- Colorado State University Cooperative Extension provides gardening publications in Adobe Acrobat PDF formats.
- http://aggie-horticulture.tamu.edu/colorado/gardpubs.html

Colorado Gardening
- Gardening tips, events, links and information for the Colorado gardener.
- http://www.coloradogardening.com/