Thanks for sharing photos, both of you..
I've got many of the same plants here, but would never dare to try a banana again.. I had the same one in Los Altos, and it was marginal there.. I'm not sure that we get much colder here, but it seems to affect tender plants worse. I was figuring it might have to do with both moisture in the air (more), and less hours of sun being in a canyon.. but I love Sonoma County, and it looks like you found a beautiful spot that has only been enhanced by your skills in the garden.
