Here is a picture of where the field expansions in Konohana are. The first four expansions and the waterwheel expansion are based on personal experience. The fifth expansion is based on there only being one left.
I am indebted to someone who posted an excel spreadsheet with the complete field in it. I've changed this a lot from then, but if I could remember who that person was I would definitely give them credit for doing a great job.
Anyway, I post it in case it is helpful. There seem to be lots of pictures of the original fields and the fully expanded fields, but I never saw one with all the intermediate stages.