Q.How To Plant Bittersweet Seeds Zone 5?
I would like to know how to start bittersweet seeds indoors zone 5. I know the seeds have to be stratified but I’m not sure when to start the seeds indoors, what kind of lighting, watering, and temperature they need. Any help would be appreciated. Thanks.

Certified GKH Gardening Expert
In your zone, the best way to prepare these seeds will be to let nature do it. They are classified as invasive and have no problems starting outdoors, after a winter cold stratification.
Just plant in a container once the weather starts to stay colder, and allow the winter weather to work its magic.
I would avoid planting in ground, since they are known to become highly invasive. Consult your local agricultural services for information on any restrictions with planting these.
Here is an article that will help you to care for the plant:
https://www.gardeningknowhow.com/ornamental/vines/bittersweet/growing-bittersweet-vines.htm