Brugs are perennials whereas Datura are considered annuals. Annuals bloom set their seed and die once frost hits them. Brugs usually take a year or two to flower from seed just depending on what zone you live in and how much sunlight, warmth, and fertilizer they are getting.

Thanks! I didn't realize Brugs were perennial.

Marg,
They're treated as perennials in the south, but can't take freezing temps. So, in the north, they're treated as annuals or brought in for over-wintering.
Gail

Actually, some brugs are root-hardy in Zone 7. I have several that I cut back to ground level and mulch in, and they pop back up each spring. The hard, woody trunks can withstand a few hours as low as 27 degrees, but all the tender green parts are goners with the first frost.

I find that to be so with Brugmansia as well
They can take a fare bit of cold. and yet come back from the ground.
Actually I have some Datura here in Canada, well it is one particular Datura, that was given to me by a Japanese fellow that comes back, not always, but often from the original plant left out in the cold of winter here.
I now have several plants of this original one and keep seeds So always have some Seeds even come up that where left out in the yard overwinter. Is a long white but with a bluish tint to the flower Not fragrant at
all. I sort of treasure the plant as the man who gave it to me maybe ten years ago, is now diseased