Parris Island Cos Romaine Lettuce Seeds

Grow Crisp Parris Island Cos Romaine Lettuce

Grow crisp, flavorful romaine lettuce at home with Parris Island Cos, a classic heirloom variety valued for its tall, upright heads and dependable garden performance. The dark green leaves, sturdy pale ribs, and mild flavor are excellent for salads, lettuce wraps, sandwiches, and fresh garden meals.

Parris Island Cos offers better heat tolerance than many romaine varieties, although lettuce grows best during cool spring and fall weather. Harvest mature heads or pick the outer leaves as needed for a longer cut-and-come-again harvest.

Why Gardeners Choose Parris Island Cos

• Classic heirloom romaine with crisp leaves and sturdy ribs
• Non-GMO, non-hybrid, and open-pollinated seeds
• Suitable for garden beds, raised beds, containers, greenhouses, and hydroponic systems
• Grow mature heads or harvest individual outer leaves
• Excellent for spring and fall succession planting
• Beginner-friendly variety with clear growing directions
• Seeds sourced and packed in the USA

What Is Included

• One 2-gram packet of Parris Island Cos romaine lettuce seeds
• Full-color, water-resistant paper seed packet
• Planting, growing, and harvesting directions printed on the packet

Parris Island Romaine Growing Guide

Botanical name: Lactuca sativa

Plant type: Cool-season annual vegetable

Days to germination: Approximately 7 to 14 days

Days to maturity: Approximately 65 to 70 days for full heads

Planting depth: Sow 1/8 to 1/4 inch deep and cover lightly

Plant spacing: Thin plants to approximately 10 to 12 inches apart for full heads

Row spacing: Approximately 18 inches apart

Sun requirements: Full sun to partial shade

Soil: Fertile, well-drained soil kept consistently moist

Best planting seasons: Early spring and fall

How to Plant Romaine Lettuce Seeds

Start seeds indoors four to six weeks before your expected last frost, or sow directly outdoors as soon as the soil can be worked in early spring. For a fall harvest, plant approximately three months before your average first fall frost.

Sow the small seeds shallowly and keep the soil consistently moist during germination. Once seedlings are established, thin them to provide enough room for full-size heads. Plant additional seeds every two to three weeks during cool weather to extend your harvest.

Parris Island Cos can also be grown indoors using hydroponic systems, tower gardens, containers, or grow lights.

Harvesting Parris Island Cos Romaine

Harvest individual outer leaves as soon as they reach a useful size while leaving the center of the plant growing. For full heads, cut the plant at or slightly above soil level when the head reaches the desired size.

Harvest before prolonged hot weather for the crispest texture and mildest flavor. High temperatures can cause lettuce to bolt and become bitter.

Frequently Asked Questions

Can Parris Island Cos lettuce grow hydroponically?

Yes. Parris Island Cos works well in indoor hydroponic gardens, tower gardens, greenhouses, and other soil-free growing systems.

Can I harvest the leaves more than once?

Yes. Pick mature outer leaves while leaving the center intact for continued growth. You can also allow the plant to form a complete romaine head and harvest it all at once.

Is Parris Island Cos heat tolerant?

Parris Island Cos has better heat tolerance than many romaine varieties. However, it still produces its best growth, texture, and flavor during cool spring and fall conditions.