Well, I am new to this. But I know that citrus trees have to be protected from frost and any temps below 15-20 degrees, and they love full sunlight. I have seen some places growing indoors as long as they are in front of a very sunny window. You might be a little cold in your region but maybe indoors??
Here are a few articles on it:
[URL]http://homeguides.sfgate.com/tips-taking-care-owari-satsuma-trees-29527.html[/URL]
[URL]http://www.monrovia.com/plant-catalog/plants/870/owari-satsuma-mandarin-orange.php[/URL]
