Satsuma Tree Question

late winter/very early spring, while dormant

Now till before spring.

Best time is when you have time to do it. I did landscaping for years and we planted all sorts of trees all times of the year. All did about the same, how you plant is more important than when.

First off make sure you get a satsuma.

I bought what I thought was one from a credible nursery and after 3 years in the ground I have my first fruit. Definitly NOT a Satsuma. I have what seems to be a sour orange.

Best time is fall. You can do it now. Water it every three to four days, once a week use miracle grow. Protect it with warm heat during freezes while it's young or it won't make the winter.