Mandevilla Plants
Q.

Mandevilla plant

Zone Westland,Michigan | lavelle added on July 26, 2016 | Answered

Underside of the leaves have become a rusty orange color! However, the plant does have blooms! What could be the problem with the leaves? Bonnie

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on July 27, 2016

This is Rust Fungus and can appear when conditions are damp combined with lack of air circulation.
This article will help you.

https://www.gardeningknowhow.com/plant-problems/disease/learn-about-plant-rust-disease-and-rust-treatment.htm

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