In the last several years I’ve been experimenting with making use of the space between rows of grapes to grow produce. Nature abhors a monoculture, so if I can grow other crops in what would be normally be wasted space in the vineyard, without them negatively impacting the grapes, I can get a lot more food out of my space. It’s particularly important when you are establishing a vineyard and waiting for your grapes to produce. If you can grow a crop that can bring in money in year or two, you can use the harvest to pay for the cost of vineyard establishment.
When I was setting up my vineyard, I decided to space the rows 10′ apart instead of the standard 8′ so that I could improve the air flow between the vines, but also so that it would be easier to make use of the space for other crops. If you plant low growing crops, they won’t impede air flow and as long as they are out of the way by the time you harvest the grapes.