Keri,
As I began posting three years ago, cornmeal will control hollyhock rust. Now that it is present in your soil you must begin treatment early every spring. The minute that you see signs of the first sprouts, dust the area with cornmeal and repeat every two weeks throughout the growing season. I was not aware that milk also controlled hollyhock rust. Would like to hear more from those who have tried the milk treatment.
Q
this one in the glass...do its roots go through the rocks or what??
Q