I've been growing them for about 3 years now, first in Philadelphia, and now here, in Georgia and they are doing very well. They seem to be able to take the heat. What I want to know is: what plant family do they belong to? I've not been able to find much on them, on the internet. I don't even know their scientific name; it's never on the id tags on the plants, when I buy them from the nursery. Thanks.