AHC: Western khat

Under what circumstances would khat use become popular and widespread in Europe and/or America before 1900?

Well, I suppose you could get more Indian migration into cities like L.A., Miami, Jacksonville, New Orleans, and Houston for starters as khat may grow well in much of the American South.....and, as a bonus, it'd probably grow well in Mexico, too, especially the Ethiopian variety; maybe Indo-Mexicans might be the first to introduce the plant? :D
 
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