November 9, 2017
Poulsbo, WA 98370
November 10, 2017
These seem to only do very well in tropical climates and also at high elevations, however, they will grow elsewhere. Just not as productively. As for when they are in season, it can be hard to say. They will fruit, and ripen at different times during its growing season.
This article will give you some more information: https://www.gardeningknowhow.com/edible/fruits/soursop/soursop-tree-care.htm