Do you have any idea what type of milkweed it is? It is an annual or perennial?
If annual, it will not live in a pot outside and may not live in your shed. I think Ohio is a zone 5 or 6 (gets below 10 degrees in your area?).
Seeds, we need to know what kind of seeds. Annual, perennial... A name would help.http://www.monarchwatch.org/milkweed/index.htm
There are 110 species of milkweeds. Your state probably has about 15 to 20 species that are native and perennial.http://www.monarchwatch.org/milkweed/index.htm
Monarch Watch has a nice photo index.http://www.monarchwatch.org/milkweed/prop.htm
And, information on propagation--How to grow.