The garden isn't separate. I created my fairy couple to create the garden; put them on static (I think that is what it is called) so there was no need for a bedroom, kitchen or bathroom. Just a small room and gave them a tv, video game and some books to read, gardening, handiness, alchemy.
After the garden was finished, all plants at perfect, I moved them around into the pattern I wanted and added all the extras, fountain, lounge chairs and such. I saved it, moved the couple out and sent them to new home. Changed the lot from residential to community, big park and did some final work, adding the restrooms.
I normally have two or three saves of a garden in residental to have as backup, but only this one for some reason. Was deleting another garden that I didn't like and accidently delete the Mystical Garden, the one I am keeping. I still have the garden in community, but not in residential.
What I was wondering was, could I change it back to residental, move my couple back and do any changes, add some more plants (which I can't do in community setup) save it as residential a couple of times, move them back out and change it to community.
I hope I made better sense this time. Mystical Garden is a 30x40 lot and I have Midsummer Night Dream Garden in 40 0x 40.