85 Days to maturity (from transplant). Solanum lycopersicum. Beefsteak Yellow Tomato Seeds. Non-GMO, warm-season annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. A variety of the heavy beefsteak tomato, Yellow Beefsteak is a vibrant yellow variation that is both treasured for unique flavor and taste. Considered the largest of the yellow varieties, Beefsteak Yellow has been known to weigh about 1-2 pounds at harvest. About 10,000 Seeds per ounce.