Just keep it well watered, that's all you can do, assuming there's drainage holes in the pot (there should be) - if it starts wilting, this is likely due to root loss, so cut down the top foliage by two thirds to give the roots a chance to recover, keep watering. And water in well, and keep watering ,after replanting.

Well, it is now a month since I had to dig up the plant and it is still in the pot and I'm getting worried because we're now into Sept. Don't know if fall is a good time to put this is the ground. Would it survive being in a pot all winter?

I think you get pretty cold winters - it'd be safer to plant it in the ground asap rather than keeping it in a pot all winter, because if your winters are cold enough, there's a risk the soil in the pot will freeze and destroy the roots. Most plants do better planted in fall anyway, preferably before your first frost date.