with Jon. While potting would be the best way to ensure happy purchasers at your plant sale, second choice would be to put them in the ground and dig them the day before the sale. This will set them back, they may not bloom this year, but if replanted in May/June will have time to recover and settle in before fall/winter. I would also divide them as you plant, this will make the job of digging and cleaning them off easier later. I would not keep them in water or bareroot for nearly two months.