Romaine, Jericho Lettuce Seeds (Organic)

Jericho Romaine Lettuce (Lactuca sativa) is a heat-tolerant heirloom romaine with tall, dense heads of crisp, sweet, silky leaves. Bred in the Israeli desert, it resists heat stress, tip burn, and mosaic virus, making it a reliable choice in warm weather.

At a glance

• Botanical name: Lactuca sativa
• Type: Organic heirloom, hardy annual romaine lettuce
• Days to maturity: 28 to 58 days
• Sun: Full sun to part shade
• Planting depth: 1/4 to 1/2 inch
• Spacing after thinning: 12 inches
• Height at maturity: 5 to 7 inches
• Approx. seeds per pack: 500 (about 13,613 per 1 oz bulk)

Best for

• Crisp salads, wraps, and sandwiches
• Baby leaf or full head harvests
• Warm-climate and bolt-resistant growing
• Spring, summer, and fall plantings
• Garden beds, raised beds, and containers

How to grow

Sow 1/4 to 1/2 inch deep at a soil temperature of 45 to 65°F, with germination in 7 to 14 days. Grow in full sun to part shade, thinning to 12 inches apart. Harvest as baby leaves or let heads fully form; the variety holds quality and resists bolting even in heat.

Flavor profile

Sweet, mild, and silky with the crisp crunch of a classic romaine.

About Grow Organic

Grow Organic, the online home of Peaceful Valley Farm & Garden Supply, has served organic gardeners and small-scale farmers with seeds, tools, and soil amendments from Grass Valley, California since 1976.