When John was getting off at Coketown the narrator asked him why he was doing so as he wont be able to sepl much plate glass here. Then John told him that one day he took his wife jessie to Philadelphia and while coming back she saw some petunias in one of those flower pots so he was here to cut some blossoms for her.
John get off at coketown beacause when he took jessie tio trip with him she saw some petunias which where very similar to those she used to raise in her varginia home.
so he thought to stay there for a night and some cuttings for her.