Oh sorry. I made a mistake. I live in zone 5b, however, and the minimum cold hardiness listed for this plant is 6b. Has it adapted to grow here due to its fruit's hibernation capabilities?
I have been growing Datura innoxia for years. Some years it comes back from roots, sometimes not. I always spread a few seeds in the fall. This year I had 2 come back from roots, none from seed. I am in 6a-6b
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.”
― Mahatma Gandhi
Mine always come back from both roots and the huge seeds. It's almost becoming invasive here, but our drought has slowed it down. It doesn't grow as well without water.
I made a mistake. I live in zone 5b, however, and the minimum cold hardiness listed for this plant is 6b. Has it adapted to grow here due to its fruit's hibernation capabilities? 
I have it.
