I have gotten straw that was full of weed seeds as well. Unless you know the farmer you are getting it from, it is a chance. Someone told me to put paper under the straw because if the weed seeds germinate they will die. They suggested getting butt rolls of newsprint from the local newspapers. I will probably try that. Or, if you subscribe to a paper you could just use old newspapers or cardboard. We do use cardboard for the ends of the rows where the Bermuda grass is more prevalent.
