Tomatoes come in thousands of varieties, shapes, sizes and colors. They can be red, burgundy, pink, yellow, orange, green, purple, brown, black, striped or streaked. Beefsteak tomaotes are among the largest. The smallest varieties are called Tomberry tomatoes. Heirloom tomatoes refers to tomatoes grown from seeds that have been selected from season to season from the plants that have produced the best tomatoes. They are pollinated in the open by bees, insects, birds and wind without crossbreedin