I have two clones of D. regia, one of which is 'Big Easy'. I cannot tell any difference between them I have not experimented much with growing conditions. My plants get what they get. However, my plants seem to like our relatively cool conditions. They flower each July, then die back a little, then produce numerous root offshoots, and finally recover by fall. They then grow well all winter. I live near the foggy Pacific coast in northern California. During summer, the night temps always drop to the 50s F (~12 C). The normal maximum summer daily temps at my place is mid-60s F. The highest recorded July temp is 76 F (120 years of record). Winter temps here are mild with only occasional nights with mild frost. I am not saying this is the best way to grow D. regia, only what my plants get.