Black spots on my summer beauty’s leaves
by Jeff Tischler
(North west sydney)
Hi I have two summer beauty’s in my front yard north facing and both get plenary of sun. They are about 8 years old, one grows faster than the other due to having more sun each day I assume. The larger one last year starting developing black spots on the leaves and is spreading quite quickly. I was hoping you might be able to suggest some treatment for it as I love it and the flowers it produces for the wildlife around.