I got a couple Musa Basjoos (4") from a lady on Ebay a couple weeks ago and planted one in a pot and one in the ground somewhere else. They were bareroot when I got them. I suspect it will take time to start growing new roots (bad timing I know) but I'm worried about the black spots on pseudostem. They were sorta there when they arrived although I'm not sure if it's getting worse. We're having pretty good weather for the PNW lately. Should I use a copper-based fungicide?
Here is a link that might be useful: