Bring your datura in for the winter, it won't survive outdoors. I had to overwinter a datura for a garden client of mine, but that was several years ago and I don't remember the details. If you've already had a hard frost (and in MI, I'm assuming you have) it might already be too late. Do a web search for "overwintering datura" and you'll hit on some websites that will tell you how to do it.

Good luck,

CarrieB

Datura (upward facing flowers) is very easily grown from seed compared to Brugmansia (pendulous flowers)and is typically treated as annual as a result. Collect the seeds and sow in spring (or ask for suggestions on the Winter Sowing forum). Neither will overwinter in the ground in zone 5 so you will need to dig and store or simply reseed for next season.

You know, it was actually Brugmansia that I overwintered indoors!

...carry on