‘Parris Island Cos’


  • Romaine

Out of stock

Item Details

Slightly ruffled leaves are crunchy and sweet, making this variety a standout for salads, lettuce wraps, and sandwiches. Plants with buttery- green hearts grow upright and reach 10-12″ tall, and resist tipburn and are mosaic virus tolerant. Leaves can be harvested at any size. Developed by Clemson University and the USDA, it is named after Parris Island, South Carolina. Romaine, 65 days. ±28,000 seeds/oz.

History of the Plant

‘Parris Island Cos’ is a romaine-type lettuce developed around 1950 by Clemson University, and named after Parris Island in South Carolina.

Learn to Grow Parris Island Cos Lettuce

Direct Seed: 2" Apart

Seed Depth: 1"

Germination: 7-14 Days

Thin: 6-8" Apart

HVO Seeds Package

HVO packages our seeds in custom-made foil packets to keep moisture out and extend the seed life. Some of our Foil Packets have a zip-lock seal to maintain freshness. We also insert a silica gel anti-moisture packet in each foil packet.

Growing Media



Growing Parris Island cos is no different than growing any lettuce plant. Seeds can be sown directly in the garden and will mature in about 65 to 70 days.



In optimal growing conditions at least 70% of seeds will germinate. Usual seed life: 3 years. Per 100′ row: 240 seeds head lettuce/1.2M seeds leaf type, per acre: 58M seeds head lettuce/348M leaf type.



Days to Maturity

From direct sowing. Most varieties will be ready for harvesting as baby leaves in half the days shown on the packet.




Requires moderate levels of water: approximately 1″ per week. Keep soil evenly moist but not soggy. This is particularly important in the early stages of growth as overwatering the seeds can cause damage and decrease your germination rates.



Pick individual leaves or wait and harvest full heads. Mature summer lettuce stays in prime eating condition only a short time, so harvest promptly and keep planting. In fall and winter the plants stay in good harvest condition longer.


Companion Planting

Lettuce plants make good companions for beets, Brassicas, carrot, celery, chervil, cucumbers, dill, garlic, onions, radish, spinach, squash, and strawberries.



NATURAL: Full Sun. Prefers partial afternoon shade in warm weather.

ARTIFICIAL: Grows well under fluorescent or LED lamps. Needs at least 12 hours of light daily; however, more is preferred. A 24-hour day cycle may result in highest yields.



Grows best in cool weather and will survive mild frosts. Romaine lettuce can be grown as a winter crop in USDA Zones 8 and above. High temperatures will cause plants to bolt, and germination will be poor in temperatures above 80°F.




The nutritional profile of the lettuce includes vitamins C, K, A as well as calcium, folate, phosphorus, magnesium and potassium. Parris Island romaine is a fairly easy to grow lettuce type and is resistant to lettuce mosaic virus (LMV) and tipburn (TB).



Sturdy, crunchy, and packed with nutrition, romaine lettuce is a hearty salad green. Also known as cos lettuce, romaine lettuce is known for its nutritional benefits and savory, yet neutral taste. It’s also low in calories, sugar, and carbohydrates and high in vitamins and minerals. Vitamin C is Healthy for Immune System, Skin, Bones, and Teeth. Romaine is a Heart Healthy Food par Excellence.

Amazing Recipes of Parris Island Cos (Coming Soon)

Greenhouse to Your House

It may seem like a curious idea to intentionally wilt lettuce for a salad with a warm dressing.


This recipe produces tasty Parris Island lettuce wraps made using chicken. The lettuce introduces a scrumptious crunch to the serving. 


If you are looking for an opportunity to venture into some exotic Chinese dishes, this is a suitable one.


This recipe takes you closer to Italian cuisine where grilled lettuce comes naturally.

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