Question
While living in California, I planted and thoroughly enjoyed my fruitless Mulberry.  I am now in central Maine (Casco) and no one hear has heard of these trees.  Can they grow here?  I would love one or two in my yard!

Answer
All indications are that they will grow in Maine. I would suggest you check with a local tree nursery and see if they have them in stock. If the tree is commonly grown there they will have it or they can advise you on why they think it will not survive there.
I would contact the Maine Forest Service and ask one of their Foresters. Here is the web link to the contact page.

  http://www.state.me.us/doc/mfs/fpm/ff/foresters.htm

Or here is the main phone number information,

Maine Forest Service
DEPARTMENT OF CONSERVATION
22 State House Station
Augusta, Maine 04333-0022

Telephone: (207) 287-2791
within Maine only 1-800-367-0223

The only contact I have in Maine Forest Service is Dave Struble
207-287-4981
[email protected]

You could call Dave and tell him I sent you. He can either answer your question or direct you to someone who can.