I’m not a potatologist, but it seems like it should be fine to let it grow in there for a couple more weeks. It’s happy there, and that’s the main thing.
Then transplant it to a big bin/pot/raised bed or the ground outside. If it’s root bound just cut down on the sides of the root tangle and detangle them a bit before planting. Put a big clear plastic tub/tote over it at night if it will be frosty.
I’m not a potatologist, but it seems like it should be fine to let it grow in there for a couple more weeks. It’s happy there, and that’s the main thing.
Then transplant it to a big bin/pot/raised bed or the ground outside. If it’s root bound just cut down on the sides of the root tangle and detangle them a bit before planting. Put a big clear plastic tub/tote over it at night if it will be frosty.