TOMATO, SAN MARZANO TOMATO SEED, ORGANIC, NON- GMO, 25 SEEDS PER PACKAGE San Marzano, Tomatoes are a plum tomato variety. Better than anything purchased in the grocery store. Tomato, a pulpy nutritious fruit commonly eaten as a vegetable. Tomatoes are one of the low-calorie vegetables; hold just 18 calories per 100 g. Very productive plants are easy to grow.