Q.How do I identify a male from a female bittersweet vine?
I have had a bittersweet vine for 2 years, never flowered. I do not know if it is a male or female plant. The nursery I bought it from did not know either, or that 1 each was needed.
Some vines don't show much growth until the third year, so that's a consideration. Also, male flowers are so insignificant you may not know they're there. So it's probable that you have a male vine. If you want to get a female bush, I think I'd go to a different nursery. Here's an article on bittersweet: https://www.gardeningknowhow.com/ornamental/vines/bittersweet/growing-bittersweet-vines.htm