sooby said:Some of the rust ratings are based on one plant in one garden and since the severity of rust is highly influenced by environmental conditions, ratings should be more reliable for susceptibility than resistance. Also there are several different races of daylily rust and a cultivar's susceptibility or resistance may vary somewhat depending what race or races are present in a given garden. I would not read much into a rating of resistance based on limited evaluations.
Which have you found to be resistant in your garden?
It's a starting point. And, yes, rust varies. I certainly experienced that. But by selecting ones that are labeled as resistant I have ended up with very few (3) of those labeled resistant that got rust. It seems like many daylilies I got from random places, that I did not check first, got rust and I had to pitch them.
Plus a person cannot make a judgment in one year on a clean plant. Brian Reeder, a noted expert in the fight to develop rust-resistant daylilies, tests for multiple years before he declares they are resistant. I saw an excellent study recently where the researcher studied the "All American" Series. He studied them over a few years and found the rust resistance changed for a number of reasons. He did finally declare two resistant. But they might not be resistant in my garden, but I will try them.
