The leaves are starting to fill in. It's on a south facing deck. The leaves are a bit yellow. This is also the case for come of the ginkgos and a rose-of-sharon, so maybe it's the cold nights? A nutrient deficiency? I gave it a boost of fish emulsion. On the other hand, maybe I overdid the compost and organic vegetable food? However, according to this site (American Brugmansia and Datura Society), Brugmansias like heavy feeding and high nitrogen. I also noted on Gardenweb that some growers add Epson Salts - maybe next weekend if it's still lookin peaked. On the ohter hand, this may be 'killing with kindness' so maybe it should just get water and no food. Stay tuned.... 
