Jenny: It's a nobile type den, so stop fertilizing now. As Leisurley stated, continue to water until mid-Oct and then start cutting back. I left my other nobile outside last year and it received plenty of chill (about 40F) for a month. I'll admit that there were a few nights when I played hop-scotch and brought it inside for fear of freezing. The bottom leaves turning yellow are normal.
This one will bloom on newer canes. This is my first year with this one. These Yamamato nobiles require some watering over the winter, just enough to keep the canes from shriveling.
Last year, my Oriental Smiles flowered, but I think I kept it too dry. I had a lot of bud blast. Hopefully, I'll get my watering right this year!
Here's Yamamoto's link. This is where Jerry gets his nobiles.
General Care