I have seen recently a very interesting cultivar of corylus - Red Majestic. It has the same look as contorta(twisted stems and leaves) except...
There is nothing wrong with your corylus. It's normal in case of this plant. I dug up the hole about 6 feet wide and 3 deep filled with very good...
I think Metasequoia glyptostroboides will be a very good choice. It's a beautiful tree and grows best on boggy terrain :).
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