Over the spring I had borrowed an Organic Rose book that I gave back and
can't find.

It had a recipe for Sulphur powder for Black Spot.

Day before yesterday was the first day I'd seen my roses in bright light
for, what, a week? And they are covered. I'd got some powdered sulphur, but
now I can't remember what I was supposed to do with it...

tia!
--

John T. Jarrett
http://logontexas.com