Triple play...
With three easy cuts this container is split....as you can see it is bursting from the sides.
YOU CAN do this this (cut them apart) at the end of this season, and separate them the next season.......I do this all the time.
Saves on stress and repotting hassles.

Plants that need splitting
by
Hostafarian, on Flickr
.
Container split three ways and repotted in 3 gallon containers.

Plants split with a knife by
Hostafarian,
on Flickr