Last year I used rolls of weed barrier between rows to control weeds and it did a great job. However, between plants I had a lot of weeds growing and some were very tall. I tried to control them by manually pulling them out, but, since I had a large amount of plants and very little time, I could not keep up with the weeding. I don't like to use chemicals (even though I'm a chemist) on my plants, but I need to find an easier and quicker way to control weeds. Is there an herbicide that I can use between tobacco plants without killing the tobacco plants? Or is there an herbicide that I can apply before I transplant seedlings to the field?