Boy can I relate to your weeds. My vines are a year old, on their second year and weeds have continued to be an issue. I think they always will be. Since I am in So. Calif, groundcover is not much of an option due to the high cost of water here. I hope you can till your rows or grow some good groundcover. I for one had a darn hard time getting the weeds killed. I spread a vineyard groundcover this year and still had a million weeds to contend with. The outcome was that I had to Roundup everything. Oh the joy of vineyard management! Anyway, welcome to a great adventure and too your winery too. Gary