Rhododendron, Rust Color On Leaves

Question

I live in zone 5 (New York State). I have three rhododendron bushes. I planted them last fall. The leaves have a rust color on them. Should I treat them with something? Thank you

Answer 1

These two articles should help:

https://www.gardeningknowhow.com/plant-problems/disease/learn-about-plant-rust-disease-and-rust-treatment.htm
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/issues-with-rhododendrons.htm