Grow Your Own Cabbage from Seed! Instructions: 1. Prepare Soil: Choose well-draining soil rich in organic matter. Loosen the soil to a depth of at least 6 inches and remove any rocks or debris. 2. Start Indoors (Optional): Cabbage seeds can be started indoors 4-6 weeks before the last frost date in your area. Use seed trays or pots filled with potting mix. 3. Plant Seeds: Sow cabbage seeds about OE inch deep in the soil or seed trays. Space them about 12-18 inches apart in rows or clusters. 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