Grow Your Own Tomatoes from Seed! Instructions: 1. Start Indoors (Optional): Tomato seeds can be started indoors 6-8 weeks before the last frost date in your area. Use seed trays or pots filled with seed-starting mix. 2. Plant Seeds: Plant tomato seeds about OE inch deep in the soil or seed trays. Water gently after planting. 3. Provide Warmth: Tomatoes germinate best in warm temperatures. Keep seed trays in a warm location or use a heat mat to encourage germination. Seed packets , Organic seeds , Garden seed kits , Heirloom seeds , Non-GMO seeds , Vegetable seeds , Flower seeds , Herb seeds , Seed starter kits , Bulk seeds , Fast-growing seeds , Seed planters , Annual seeds , Perennial seeds , Indoor seed kits , Seed catalog , Microgreen seeds , Wildflower seeds , Seed subscription box , Seed tray sets