A few years ago I grew 8 or 10 tobacco plants in the garden. A 2 inch long flower with a tiny opening at the end. My bees could not fit down into the flower to pollinate the tobacco flower. Sweat bees could pollinate them. I can't remember if leafcutters worked the tobacco flowers or not.
Bees will work wacky tobaccy. (marijuana) It is reported to give a green pollen. I have no idea if it affects the honey or not.
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