Tomato Seeds - Thessaloniki60 80 days. Non GMO Thessaloniki Tomato seeds. Thessaloniki Tomatoes (Lycopersicon lycopersicum), are large juicy red tomatoes that are known to be easy to grow and uniform in growth and flavor. Disease resistantand even resists cracking during those brutally hot summer months. Thessaloniki Tomato Heirloom Garden Seeds The Thessaloniki Tomato (Lycopersicon lycopersicum), is a Greek tomato. The plant was introduced to America in the 1950s. Since then