Depth to Plant
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Spacing Between Plants |
Spacing Between Rows |
Days to Germinate (Sprout)
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Germination
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Planting Season
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Plant Height |
No. of Plants per sq. ft.
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Soil Requirements
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 Shop Lettuce Seeds |
0.25 inches deep |
Space plants about 6" apart |
Make rows about 12 - 18" apart |
7 - 14 days | 40F - 70F | Spring Summer Fall |
Appx. 12" tall | 4 plants per sq. ft. | Prefers soil with pH levels of 6.5 - 7.5. |
Starting Your Organic Lettuce Garden From Seed
Planting lettuce seed is one of the most rewarding ways to ensure a fresh, organic supply right in your own garden. Whether you're planting in raised beds, containers, or directly in the ground, lettuce is forgiving and fast-growing, making it perfect for beginners and experienced gardeners alike.
Choosing the Right Lettuce Varieties
Start by selecting lettuce varieties that suit your climate and taste preferences. Loose-leaf varieties like buttercrunch and oak leaf are excellent for home gardeners because you can harvest outer leaves continuously without pulling the entire plant. Romaine and iceberg varieties take longer to mature but produce full heads. For cooler climates, cold-hardy varieties perform well in spring and fall. Consider what you actually enjoy eating—there's no point growing a variety you won't use.
Preparing Your Soil
Lettuce thrives in rich, well-draining soil with plenty of organic matter. Before planting, mix compost or aged manure into your garden bed or potting soil. Aim for loose, crumbly soil that holds moisture without becoming waterlogged. If you're growing in containers, use a quality potting mix combined with compost for the best results. Lettuce prefers slightly acidic to neutral soil with a pH between 6.0 and 7.0.
Sowing Seeds Directly or Starting Indoors
Lettuce seeds are tiny, so handle them carefully. You can sow seeds directly into your garden bed or start them indoors 4 to 6 weeks before your last spring frost. If direct seeding, sprinkle seeds lightly over prepared soil and cover with a thin layer of soil or compost—just enough so seeds make contact with moisture. Keep the area consistently moist until seedlings emerge, usually within 7 to 10 days. If starting indoors, use seed-starting mix and provide bright light once sprouts appear to prevent leggy growth.
Spacing and Thinning Seedlings
Once seedlings have their first true leaves, thin them to appropriate spacing. Loose-leaf varieties need about 4 to 6 inches between plants, while romaine and iceberg lettuce need 8 to 10 inches. Thinning is essential—crowded seedlings compete for nutrients and light, resulting in weak plants. You can eat the thinned seedlings as microgreens, so nothing goes to waste.
Watering and Light Requirements
Lettuce needs consistent moisture but not soggy conditions. Water regularly, aiming for about 1 inch per week. In hot weather, increase frequency to prevent bolting. Lettuce prefers cooler temperatures and partial shade, especially during summer months. If you live in a warm climate, provide afternoon shade or use shade cloth to extend your growing season. Indoors or under lights, aim for 12 to 14 hours of light daily.
Managing Pests and Diseases Naturally
One of the benefits of growing organic lettuce is avoiding synthetic pesticides. Monitor plants regularly for common pests like aphids, slugs, and caterpillars. Row covers protect seedlings from insects during early growth stages. Hand-pick larger pests like slugs, or use organic methods like neem oil or insecticidal soap if needed. Provide good air circulation to prevent fungal diseases, and water at the soil level rather than overhead.
Harvesting Your Lettuce
Most loose-leaf varieties are ready to harvest in 30 to 45 days. Begin picking outer leaves once plants have several leaves, allowing the center to continue growing. For full heads of romaine or iceberg, wait until heads feel firm. Morning harvest provides the crispest, most flavorful lettuce. Continue harvesting regularly to encourage new growth and prevent bolting.
With attention to soil quality, consistent watering, and appropriate timing for your climate, you'll soon enjoy abundant harvests of delicious, organic lettuce grown completely from seed.
