How do I get rid of rust on a hawthorn tree and what fertilizer should I use to feed the tree?

Question

Our home is on the Eastern Shore of Maryland.

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Answer 1

This is unfortunate, since this will be incurable. You can treat the disease, but eventually it will kill the tree.

This article will help: https://www.gardeningknowhow.com/plant-problems/disease/cedar-hawthorn-rust-disease.htm

As far as what to feed them... Any well balanced fertilizer will be fine once per year. This article will help: https://www.gardeningknowhow.com/ornamental/trees/hawthorn/growing-hawthorn-trees.htm