Viewing post #2513227 by sooby

Nightlily said:

I was told that Xylella fastidiosa is not frost hardy - I completely understand the problems in warmer climate (winegrowing friends in Italy are frustrated about the disease), but as far as I know the bacterial strain that is responsible for the problems was importet with coffee plants an is not able to survive in daylilies. But daylilies are not a popular garden plant in Europe and so nobody cares.

Unfortunately daylilies have been recorded as a host of Xylella fastidiosa, see Table 1 here:

https://apsjournals.apsnet.org...

There's an article on its possible cold hardiness in Europe here:
https://www.nature.com/article...

Have you thought about purchasing daylily seeds of the lines you want from North America? Also some of the species daylilies flower quite late.