I apologize for this delayed reply to your gardening question and hope it is still helpful to you.
Hydrangea trees should grow there fine. They just are not that common. They love a moderately acid to neutral soil that it kept moist but drains well so as not to stay soggy. I would wait and watch the tree to see how it does. If leaves start turning yellow at the ends of the branches it would be good to add acidifying fertilizers. Otherwise it will most likely be fine.
Thanks for the question. Best wishes for a wonderful gardening year in 2007. Please stop in again soon!
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