Hello,

I have Knockouts that I planted 3 years ago and until this Summer they have been just glorious. But in the recent weeks, the leaves have gone from lucious green to yellow & then to brown & dying off. All of the leaves are gone from the bottoms of my roses and I have no clue as to what has happened with my hardy plants! I do not think it is a watering problem with either too little or too much, I maintain them pretty well. Any suggestions?

Thanks!