They are native to North Carolina so they do best out side..in peat moss always always keep it soaking wet.I tried. But, alas, I have a black thumb and failed miserably. Even my cactuses had to go into my dad's care before they, too, died.
My mangroves aren't dead yet though! (But that's a discussion for another thread)
OOhh..yeah they are hard from a seed takes forever.I tried to grow mine from a seed I got in an obscure book store in Madison (WI). Yeeaahh....