Alreadysuggestedrequiresenginechangesetc.
I know, that there are already items (bugged this way maybe) that you can plant on the ground. Like trees, you could have seen them in NCR pubs etc. Or lockers, those high metal ones, i saw them in trapper camp base. I have even heard about someone, who has all kinds of furniture as items in some locker and is able to plant them on the ground.
So no engine change required. Just find those items that can be planted on the ground. Then make some NPC trade them via dialog. Say a 1 tree for 100 Fruit, 100 Junk for Metal locker, 200 Wood for wooden shelve.