I have a small fig tree given to me by a dear friend two years ago. It is a third or fourth generation volunteer (rootstock sucker) from Italy. Unfortunately, I'm told that it's from southern Italy and we are in West Virginia, so it has to be potted and brought in to keep it from freezing in the winter. Otherwise it would have a permanent place in my back yard. That said, I like to do everything as organically as possible and have a question about containers. My 5 gallon white buckets are food grade but will be too small next year. I have a large planter that's very heavy with mix and hard to transport on a dolly back and forth inside and out, but looks like my only reasonable option. I don't like it because I think that there's a high likelihood that the tree will take up chemicals from the black plastic resin of the heavy container. I'm only interested in the fruit, Not as a house plant BTW. I was thinking about planting it in the yard and digging it up before the fall frost, but am concerned that the root damage might kill it.
Do you have any recommendations about ground planting the fig and transferring or type of container?