Cold hardiness - Corydalis taliensis

[Robert]

This summer I was able to germinate and grow some seedlings of Corydalis taliensis. Does anyone have any experience with their cold hardiness? I will protect most or maybe all of them this winter, however it would be helpful to know what sort of minimum temperatures they can handle. Thank you so much for any advice!

[Maggi Young]

Here,  http://www.srgc.net/forum/index.php?topic=11242.msg294705#msg294705 there was talk of C. Blackberry Wine' and Jacek quoted "Bleeding Hearts, Corydalis and Their Relatives" by Tebbitt, Liden and Zetterlund (2008) -  "page 142: Corydalis taliensis ... is a perennial ... that is only marginally frost hardy. ... C. taliensis can be increased vegetatively, since the nodes of the plants often root when they come into contact with the substrate. ... Corydalis shihmiensis is similar to C. taliensis. "

But Kevock Gardens - from a chilly spot near Edinburgh says in their catalogue :
" We made the mistake of thinking this Chinese species needed protection under glass, and it grew until it reached almost from side to side of the greenhouse. Outside it behaves itself, with long, arching, branching, fleshy stems and grey-green foliage, with each branch ending with a raceme of deep reddish pink flowers."

Bob Brown of Cotswold Garden Flowers says it is winter-green in his area - the west-midlands of England .

[Robert]

Maggi,

Thanks for the information. I had already read the information in the Corydalis and Relatives book and thought that there might be more to this. I'm glad that others have shared their experience with this species -  this gives me a starting point and I can take it from there. When I have a few extras I'll start experimenting with them without protection during the winter. Many plants that are considered hardy in the maritime NW U.S.A. suffer frost damage here. It will be interesting to see how they preform here.