80-85 Days to maturity (from transplant). Solanum lycopersicum. Black Russian Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. This heirloom tomato grows on bushy plants and yields medium, 4-ounce fruit that turns black as it matures. ~# seeds/oz.