Thanks guys. Skyval, we mostly make corn brooms from broom corn. They are very durable. We had a handmade one for 17 years, but the kids packed it of & it got wet. That broom was made with natural hemp twine. We make ours with nylon seine twine, which won't rot.
A friend has the sister to our old broom. She's had it on her porch now for 20 years. Another came to our booth and said she has a hand woven broom in good shape that is 30 years old.
If you hang the brooms on a nial, and keep them dry, they last for many years. At least 10. Maybe 20-30, depending on how much you sweep!