@428eea05 PS, I can report that they self-sow handily and volunteer the next year. Save some seeds, too, of course, to share. These are just one of "approximately 75 to 90 species of plants in the nightshade family (Solanaceae), [both annual and perennial, I might add; I have two perennial varieties that are native to my site in Zone5a, Michigan] which are native to the Americas and Australasia. At least 46 species are endemic to Mexico.