I just found out that some cassia plants grow well where I live. I have a book that list many different types of cassia, but has no mention of cassia obovata, which is the type sold at mehandi.com. Does anyone know about where this type of cassia can grow? I'm in Arizona. If it can't grow here then can any other types of cassia have the same conditioning benefits as obovata? Some of the cassia plants in this book aren't for my area, and some are trees, and I'm not growing a tree just for my hair. So I only have a few options.