Does anybody know of an extensive plant photo database where users can upload photos of plants and use other members' photos of plants without worrying about copyright? Or is there an extensive plant photo database available via a membership fee, where one can use the photos to make plant grouping collages and upload them online for garden design purposes, without having to worry about copyright? Thank you in advance!
Try starting here: http://commons.wikimedia.org/wiki/Category:Plants You will still need to check the license for each photo, most of the photos are under licenses which permit any sort of use (including commercial use), provided you acnowledge the photographer.
