The British Clematis Society website is open to members and has non member sections as well. Find growing information as well as listing of events and a forum.
The International Clematis Society website is another resource with great information available to non members as well, including a new clematis of the month write up each month, and the past archives of many years of clematis of the month are good reading and invaluable information.
Clematis on the Web, is a resource that includes information on over 3, 000 clematis cultivars and species, as well as growing and other useful information. There is no membership required to use the site.
Since 1996, Roseville Farms has been perfecting the art and science of propagating
and growing Clematis vines. This focus and dedication has positioned Roseville Farms as the largest Clematis producer in North America, with more than 5 million plants produced annually! Our 40-acre nursery, located in Apopka, Florida, specializes in those large flowering hybrids that perform best in our North American climate and growing conditions.