About This

• Heat-Tolerant Upright Romaine: Jericho Romaine Lettuce (Lactuca sativa) forms tall, sturdy heads with crisp ribs and tender, mildly sweet leaves. Known for its strong heat tolerance compared to many romaine varieties, it grows 18–24 inches tall and delivers reliable harvests in extended spring and early summer conditions.
• Full Sun to Partial Shade: Thrives in bright sun but also performs well with light afternoon shade in warmer climates. Ideal for garden beds, raised planters, and succession planting.
• Consistent Moisture for Crisp Heads: Keep soil evenly moist during germination and head formation. Avoid allowing soil to dry out to maintain tender texture and prevent bitterness.
• Direct Sow & Thin for Full Heads: Plant seeds ¼ inch deep in early spring or late summer. Germination typically occurs within 5–10 days. Thin seedlings to 8–12 inches apart to encourage proper upright head development.
• Hardiness Zones: USDA 3,4,5,6,7,8,9. | Type: Annual | Sun: Full sun to partial shade. | Planting Depth: ¼ inch. | Spacing: 8–12 inches. | Watering Needs: Moderate and consistent. | Blooming/Production Season: Spring and fall harvests. | Expected Height: 18–24 inches. | Days to Maturity: 60–70 days.
• Please post photos of your Jericho Romaine Lettuce plants in a review! - Isla's Garden ‍.

Overview

• Indoor/Outdoor Usage : Indoor, Outdoor
• Brand : Isla's garden seeds
• Material Feature : GMO Free. Heirloom
• Color : Green
• Special Feature : Heat Tolerant, but prefers cool, moist conditions.
• Expected Blooming Period : Summer to Fall
• Item Weight : 7.08 g
• Sunlight Exposure : Full Sun
• Unit Count : 1000 Count
• Expected Planting Period : Spring to Summer