Type
romaine
Lettuce variety
Parris Island Cos Lettuce
A dependable romaine with upright heads and crisp leaves. It is widely grown for classic Caesar-style lettuce texture.
Days to maturity
65 to 75
Best for
romaine hearts, salads
About Parris Island Cos
Parris Island Cos is a tall heirloom romaine with upright leaves, thick texture, and a pale, tender heart. It is dependable, flavorful, and large enough to serve as either baby romaine or full-size heads.
Growing Parris Island Cos Lettuce
Thin properly if you want full heads, because crowded romaine stays narrow and does not heart up as well. Water consistently to keep the leaves crisp, and harvest before the center begins to elongate in heat.
Full growing guide
For planting dates, care, and harvest that apply to all lettuce, see the complete guide.
How to grow LettuceOther lettuce varieties
Variety characteristics are general guidance for US home gardens; performance varies by climate, soil, and season. Seed and plant availability differs by supplier. Page updated Aug 4, 2026.