I asked a question today involving potted plants. With it I made the tag potted-plants. I was kind of confused how that tag hadn't been created before, but I later remembered that we had the tag for container-gardening.
Why not let the community decide?
I've suggested the tag potted-plants as a synonym of the tag container-gardening, so users with 5 or more reputation in the container-gardening tag (see all six users who currently qualify) can vote on whether or not it is a good synonym.
If the suggestion is deleted, we can remove the tag from your post, and with no questions, it should be gone in the next day.