Vineyard row middles are often covered with living vegetation at least part of the year, usually during the winter. Growers may plant row middles with cover crops or allow weeds and other self-seeding plants to grow, generating living material (biomass). In the past I have written about cover crops and the numerous benefits this plant material brings for vineyard soil health, chemical and physical properties. Growing live vegetation in row middles can make huge differences for soil water storage, soil fertility and vine performance. In this part of the vineyard floor, it is fairly easy to control unwanted vegetation (weeds) by mowing, tilling and occasionally spraying herbicides (not needed in most cases.)