- A great beginner lettuce variety for warm temperatures between zones 4 and 9.
70-80 days. These non-GMO Salinas lettuce seeds easily grow into green leaves and are great for beginners. Salinas Lettuce, also known as Iceberg Lettuce, is ready to harvest in 70 to 79 days. The Salinas thrives in full sun or partial shade, being heat resistant, and can be grown in zones 4-9. The leaves of the Salinas have a mildly sweet flavor. Approx 16,000 seeds per ounce.