'Black Russian' tomatoes are an heirloom variety suited to colder climates. They have a black/mahogany skin that is both sweet and acid. A popular and delicious salad tomato.
Tomato - 'Black Russian'
Tomatoes prefer open sunny positions and are sensitive to frosts. Mulch them well and water in furrows rather than overhead to reduce disease. Consistent watering is required - they hate to be waterlogged however they are prone to blossom end rot if allowed to dry out too much between watering.
They grow well on light to heavy soils with good drainage and high organic matter and phosphorus.
Find a new spot for your Solanum family each year or so (Tomatoes, Capsicum, Chillis, Eggplant, Spuds) to prevent disease.