Thank you!

How do you propagate them? Do they produce seeds or can you take cuttings?

They have small white flowers, followed by red berries which contain a few seeds each. If you handle the berries, best to wear gloves as some folks are allergic. You can buy seeds online in a lot of places. Just do a search on the internet. They may not be hardy in your area, especially if you are away from the coast. A local nursery would be a good place to ask.

Houseplant in Michigan I wonder if it can keep yo thank you very much

I assumed you were on the Gulf coast, since this is the Gulf Coast forum. As a house plant, asparagus fern is very common and should be fairly easy to grow. They tend to be a bit messy because they drop some of those needle-like leaves. Good luck.