It's both the blessing and the curse of plants - they grow. Take this specimen - a nice potted mandrake - for instance.
This fine example of the knitter's - erm, gardener's - care clearly needs to be dealt with. He's grown leafy and fine, but he might be getting a little too big for the pot that he currently calls home. He either needs to be bumped up into a bigger pot or...
...he needs to be split in two, and each half provided with a pot of their own. Trust your gardener's instinct - you'll know what to do.
Ahh...that feels so much better!