Tia - sorry to say the sulfur spray is only for dormant season (when the plant
is leafless) - it is too strong/burns the leaves in the summer even in the
dilute form.
Jaykhill wrote:
> Is a sulfur spray considered a reasonable organic solution to treating black > spot on roses? I have one bush which is hit so hard it would be virtually > leafless if I cut off each spotted leaf? > > TIA > > John Cahill, Mt. Vernon, VA