Well, its possible that the fan just wants to be tall, too
and the ones in shade here have made it to amazing heights ... but usually when they begin to seem like two different layers (like yours looks to me) then I have found in my own garden that they usually are ready to divide themselves.
Leaf streak is such a close look to rust, I think, without the neon tint or the puffed-up grains that will come off in your hand or on a soft piece of material. I used to think I had rust, but every time I tried to get something to stain a tissue or come off in my hand, it turned out it was just leaf streak. Then I saw real rust on my snapdragons ... jumped out neon orange at me from 50 feet away, no mistaking it, and really beat up the plants immediately. Here's a link to a web page that has a pop-up showing both leaf streak, and the pustules of rust that distinguish the two from each other:
http://gardening-time.blogspot...
I'm learning from your photos and discussion too - and we may both learn from additional info from others who post to your helpful thread! Thank you for bringing us into your garden to see what we each see in our own, with the chance to learn more from each other!
