Why Do The Leaves On My Double Pink Knockout Roses Turn Brown And Crunchy?

Question

I trimmed my knockouts back in September of 2019 pretty low down because they were nothing but twigs. I also give them Epsom salts every February. I recently added several bags of Rose dirt to the bed thinking maybe that would help. All of my bushes are over 5 years old.

• 
• 

Answer 1

These articles should help:

https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/knockout-roses-turning-brown.htm

https://www.gardeningknowhow.com/ornamental/flowers/roses/brown-edges-on-rose-leaves.htm