Cathie

Actually I've done it - in the truck (not a long, cold or overnight move though) and everything was fine. You need to box them at least to the pot tops - like sizes with like, stuff whatever around the pots to keep them stable, and get them into the truck last (advise the movers you'll need the floor space and how much ahead of time), and off first - into the tub or on the deck are good safe places.