In most areas you'll be planting about three weeks before the opening of bow season, then hunting the site a limited number of times, depending on the crop. You need to consider both its attractiveness and its durability. Deer love peas, for example, but can eat an entire plot in about a week. Clover also draws whitetails and will buy you several more days, depending on the population density. Brassica blends are another favorite, but they mature at different times and give you maybe a month to six weeks.