Would this current photo be rated as a 3, 4, or 5?
To get an idea how to rate that leaf, you could try taking another photo every few days until the leaf dies. Then you could compare the photos. The one with the rust covering the most would be a 5. That presumably would be the most that rust would cover of any daylily leaf.
If 1 is for no rust then the maximum amount of rust covering the leaf would be rated 5, 75% of that maximum would be a 4, 50% of that maximum would be a 3, 25% of that maximum would be a 2 and no rust would be a 1.
