Actually, that's brown blotches with bright yellow borders. I don't know
why I said black...
"Adam Schwartz" wrote in message
news:04IOa.11456$N7.1689@sccrnsc03...
My sunflower has developed brown blotches surrounded by black borders.
What
is this? Is it detrimental to the health of my sunflower? How do I treat
it?

Thanks,
Adam