Problem Growing Chinese Hawthorn

We bought the Chinese Hawthorn (Crataegus pinnatifida) from Cliff England. It was grafted. In spring time, the tree grew nice. But very quickly green leaves developed rust. Then the entire foliage weakened and turned to yellow. After two seasons, the tree did not make it. I still get the weak rootstock. Several of us bought the same at the same time. I’ve heard other people had the same rust problem.

I’d like to grow it again. But just wonder if anyone else has similar experience and the rust is common. Not sure if our spring climate is too wet. Or we need to spray it.

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I’m planting two cultivars of Crataegus pinnatifida this spring. I’ll spray it with copper based on your experience with rust.

Maybe you had something like CAR or related. Do you have Junipers closeby?
https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/diseases/rusts/cedar-hawthorn-rust.aspx