In article ,
says...
Has anyone any experience of growing this from seed? I'm wondering how long
it takes to get to any reasonable size.


About 4 year to flowering size although the first 2 years were in a
tunnel/conservatory, its surprised us by taking to its north facing shady
spot and flowering, like Nick no fruit (serves me right for not putting
it in full sun!)
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea