I have grown these in the ground and have had pretty good bloom success. I dug them and stored them dry in winter, and replanted them in early summer. More recently, I have grown them in a large pot outdoors in the summer with much water and inside the cool greenhouse without any water in the winter, still in the same pot. They have continued to bloom each year for 4 or 5 yrs. They bloom for me in late August. Dell Dell Sherk, SE Pennsylvania Zone 6