Interesting Pat. In other plants their rust resistance can change from seedling to adult plant but that hasn't been formally looked into for daylily rust as far as I know. It probaby won't be since it's not as big a deal as it could be for annual agricultural crops because for the most part people are growing only adult daylilies, except for hybridizers. What it does suggest, though, is that maybe a susceptible seedling shouldn't be written off too soon!
