Hi,
I think part of your question must be missing - ? Try asking the question again, or respond to this answer with the name or type of plant you are referring to please.

This guest will have to ask again in a new question - or join us, as guests can't respond, Weeding!

For almost anything though, the answer is "in the ground" if your ground is suitable for what you are trying to grow. And assuming it's not tender so that it needs to be moved indoors for the winter.