Thanks for that link
@sooby
Sounds like my natural growing conditions may combine several inhibiting factors much of the time. Those conditions can be erratic, though. Certainly the early growing season this year should have been conducive to an outbreak of rust. Temperatures in the right range and lots and lots of regular rain keeping foliage wet followed up a really mild winter. My daylilies looked great during that period. They didn't start looking sad until the temperatures got hot and the rain ceased. We've had a lot of unusually high humidity this year, but the heat and winds start up early in the day so I expect the foliage dried off. Reading the article makes me think my climate will normally be unfriendly to rust. Unfortunately it can also be unfriendly to a growing plant.
