If these plants are looking healthy, and have cropped to your satisfaction and you need to move them, I would water them well, lift them and individually trim them of tatty foliage. Plant them in grow bags, about eight in the centre of each bag, maybe 4-5 " apart. Water them regularly and place in half shade. They should soon produce an array of runners. select several and pin down with "n"s of coat hanger wire from the dry cleaner ,two or three on each side. Remove all others. By Cctober you should have, say 45 good new plnts established which can be severed and planted out. There would be no harm in keeping the bag going through the winter, firstly outside in a bit of frost and then clean and put in cold frame/coolhouse or tunnel. Keep barely moist until Jan 22nd, and then progressively water and feed to get an early crop. The old plants can then be composted