Romaine, Jericho Lettuce Seeds (Organic)

Jericho is an upright green romaine selected for warm growing conditions, with crisp leaves and a sweet, mild flavor for salads, sandwiches, and wraps. Gardeners can harvest it as young leaf lettuce or allow plants to develop more mature romaine heads. Its 28–58-day maturity range reflects those different harvest stages. This organic seed can be sown for a cool-season lettuce crop while giving growers flexibility to pick leaves at the size they prefer. Full sun to part shade and generous spacing support the tall, open romaine form.

Variety Details

• Botanical name: Lactuca sativa
• Plant type: Hardy annual
• Lettuce type: Upright green romaine
• Flavor and texture: Sweet, mild, and crisp
• Harvest options: Young leaves or more developed heads
• Packet: Approximately 500 seeds

Sowing & Growing

• Soil temperature: 45–65°F
• Planting depth: 1/4–1/2 inch
• Germination: 7–14 days
• Days to maturity: 28–58 days, depending on harvest stage
• Sun: Full sun to part shade
• Spacing after thinning: 12 inches
• Mature height: Approximately 5–7 inches

Use a fine, prepared seedbed and keep the shallow sowing zone evenly moist until seedlings emerge. If you plan to grow full romaine heads, preserve the listed spacing after thinning so each plant has room to develop. For baby-leaf use, begin harvest earlier and select clean outer leaves or cut plants at the stage you want. In warm weather, check soil moisture and plant condition regularly rather than relying on a fixed watering schedule. Record sowing and harvest dates to learn which part of the maturity range fits your season. Harvest during the cooler part of the day when possible and move leaves out of direct sun.

Compare this variety with other options in our Lettuce Seeds collection.