Tomato Seeds,
Korean Long

Start seeds indoors 6 to 10 weeks before the last frost date in your region. Transplant seedlings outdoors after all danger of frost has passed and the soil temperature consistently reaches above 60 F. In areas with shorter growing seasons, consider using raised beds or black plastic mulch to warm the soil and extend the growing period. 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 about 1/8 inch deep in a seed-starting mix, keeping the soil at 70-80 F. You can use a heat mat to help warm up the soil and speed up germination. Harden off seedlings for 7-10 days before transplanting by gradually exposing them to outdoor conditions. Space plants 24 inches apart.

Fertilize with a balanced, slow-release fertilizer at planting, and side-dress with compost or additional fertilizer every few weeks during the growing season. Remove suckers (small shoots growing between the main stem and branches) to focus energy on fruit production. Monitor for common pests such as aphids, hornworms, and whiteflies.

• 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.