Tomato Seeds,
True Black Brandywine

Start seeds indoors 6–10 weeks before the last frost date in your area. Transplant seedlings outdoors once temperatures consistently stay above 60 F. True Black Brandywine tomatoes need quite a long growing season, maturing in 80-90 days after transplanting. If you’re not sure how to find your first and last frost dates, consult our blog post "Our Experts Answer Questions, Share Resources."

Sow seeds 1/8 inch deep in a nutrient-rich, well-draining seed-starting mix. Keep the soil temperature between 70-80 F for optimal germination. Seeds should germinate in 7–14 days. When seedlings develop two sets of true leaves, transplant them to larger pots or outdoors once frost risks have passed. Space plants about 24 inches apart, and water thoroughly after planting to establish roots.

Consistent watering is very important, so provide about 1–2 inches of water per week. Water at the base of the plant to prevent wet foliage, reducing the risk of fungal diseases. Apply a balanced fertilizer or compost at planting and side-dress with additional fertilizer when flowers begin forming. Prune suckers to focus the plant's energy on fruit development and prevent overcrowding. Mulch around the base of plants to retain moisture and regulate soil temperature.

• Most tomatoes are self-pollinating and don't frequently cross; in a garden setting, separating by 25 feet should prevent 99% of cross-pollination. Or you can bag and hand pollinate for 100% purity.
• On a small scale, seeds may be scooped from the fruits and dried on a paper towel.
• For larger quantities or cleaner seeds, fermentation for a few days is recommended.
• Once dry, tomato seed can be stored in a cool, dry, dark place; good seed retains viability for 5 years or more.