Can I cook fresh green beans in a crock pot? If so, How long will it take to make it?

I recently cooked fresh green beans in my crockpot. Since it was my 1st time to try this method I covered them with water, seasoned them and cooked them on High overnight then early morning when I checked they were done. I changed the temperature to Keep Warm until they were served for a potluck at noon. I would recommend setting the crockpot on Low and let them cook all night then if they aren't done you can always put the temperature on High. This way it will be ready to serve whenever you need it. The consistency was like canned beans but tasted so much better being fresh. I think everyone will be pleased with this method.