Rose Bern is a Swiss heirloom tomato (Solanum lycopersicum) renowned for its exceptional flavor and beautiful rosy-pink fruit, typically producing 4-8 ounce globular tomatoes on indeterminate plants that mature in approximately 75-80 days from transplant. The variety germinates readily when provided with consistent warmth and moisture, with seeds emerging in 6-14 days under optimal conditions, making it a straightforward choice for home gardeners seeking superior taste and disease tolerance.
Before sowing
No pre-treatment needed — sow directly.
Sowing
What to expect
Tips
Use a heated seed-starting mat to maintain soil temperature at 80°F (27°C) for optimal germination. Sow seeds ¼ inch (0.25 cm) deep and lightly press seeds into moist soil for good seed-to-soil contact. Maintain consistent soil moisture without waterlogging; avoid overwatering as it encourages fungal disease. Once seedlings emerge, remove any cover and provide bright light for 14-16 hours daily to prevent leggy growth. Start seeds indoors 6-8 weeks before the last frost date in your region. Avoid starting too early as seedlings become weak and leggy if left to mature in small containers for extended periods. Transplant seedlings to individual 4-inch pots when first true leaves develop. Do not plant outdoors until 2 weeks after the last frost date when soil temperatures have warmed to at least 50°F.
Sources: Sow Diverse CLG, Thresh Seed Co., Fedco Seeds, Fruition Seeds, Kids Seed Co., Tim's Tomatoes, High Mowing Seeds, and Solanum lycopersicum scientific literature
