- You will get 600+ Seeds of Romaine Cimarron Lettuce Red Garden Heirloom Vegetable Seeds. - Cimarron Red Romaine Lettuce Vegetable Seeds. - 600+ Seeds. - Maturity: 28-65 Days. - Planting Depth: 1/8". - Distance Apart In Row: 10-12". - Rows Apart: 18". - Plant In Full Sun After Chance Of Final Frost. - Sunlight: Partial Shade, Full Sun, Medium Sun. - Cultivating Difficulty: Moderate. - Watering: Medium.