Electra is in its second season in my zone 5/6 garden.
It wintered well, but was lost to the ground by a late freeze. I was afraid I'd lost it, as yellows tend to be tender, but as you can see by the photos I posted it came back full force.
The temps have been high 90's low 100's and this is the bloom I'm getting.
It has a spreading habit, but that is easily forgiven given its performance. I've not seen any disease at all here in the Inland NW.
The yellow blooms mature to a nice cream which don't seem to water stain or brown in the sun.