Winter Plan for a Fig Tree

[JohnB]

I have been trying for a few years to grow a healty fig tree from cuttings or a small plant without success. I finally have one that's prospering in a container so I'm trying to plan ahead for its winter. I'm trying to decide if I should plant it in the ground or move it indoors,

I see on the web that some people recommend keeping the container in a cool, dark place during the winter. My question is if a completely dark place like a garage is OK.

Thanks in advance,
John

Lattarula Italian Honey Fig Tree
Zone 7 (New York City)