I am not the expert, but it is hardy to zone 4 and perennial and typically those criteria fit WS.

Only thing is, I wintersowed some of my blue clematis seeds one year, but what came up turned out to be what look like Sweet Autumn Clematis. Maybe it crossed with a neighbor's plant or something, or maybe there is a wild form that they can revert to? The plants bloom very well though.

Large flowering hybrid clems should ws well but be aware it could take more than a year to germinate and even then germination might be hypogeal- roots will germinate first and it might take another season to grow leaf.
I have grown numerous small flowered species and herbaceous forms of clems with good success. Alpina, macropetala do well with WS and a lot of fun as no two plants will be alike and you will get all kinds of different shapes and colors.

It takes two or three years to bloom and the hybirds do not come true to seed, but they do bloom pretty once they start to bloom.

Hi All,

Thanks for all the information. I think I'll go ahead and sow some and see what happens.

Peaches