Dear Wilbert Give me a few hints. I grow mine in an intemperate climate (got to -14 F last winter) and T. giganteum comes up late. I have only had bloom and seed once. I grow mine in a fairly shady site, but the only one to bloom was in a mostly sunny site. What can you suggest sunnier or shadier? They are late in either site. Mine are still in full leaf now and look very happy. They'll stay up until frost hits them. Doesn't sound exactly like your experiences. best Thanks Jim James W. Waddick Voice: 816 746 1949 8871 NW Brostrom Rd E-MAIL: jim-jim@swbell.net Kansas City MO 64152 Fax: 816 746 1939 Zone 5/6 - Winter low -10=B0F Summer high +100=B0F