Pair of Parris Island Cos Lettuce with chopped lettuce in a bowl on a white background.
Several heads of Parris Island Cos Lettuce and a bowl of salad on a wood board.
Parris Island Cos Lettuce heads held in the hands of a gardener.
Several heads of Parris Island Cos Lettuce and a bowl of salad on a stone background.
Pair of Parris Island Cos Lettuce with chopped lettuce in a bowl on a white background.
Several heads of Parris Island Cos Lettuce and a bowl of salad on a wood board.
Parris Island Cos Lettuce heads held in the hands of a gardener.
Several heads of Parris Island Cos Lettuce and a bowl of salad on a stone background.

Lettuce Seeds,
Parris Island Cos

4.828 ReviewsSKU: #LT101Min. seed count: 250
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Description

(Lactuca sativa) Cos. This variety boasts all the merits of a commercially bred variety, but the crisp and sweetly scrumptious leaves say heirloom. Parris Island Cos is a romaine lettuce beloved by growers, especially on the Eastern Seaboard, where it was originally introduced by Ferry Morse in 1951. Super uniform, upright leaves, observed disease tolerance, and moderate bolt resistance were the growing traits selected at Clemson College Agriculture department when it was bred for their South Carolina climate. The tender crisp leaves with delicate white hearts and the perfectly folded centers for scooping dips or holding dressings have won the hearts of gardeners for generations.

Growing Tips: Parris Island Cos lettuce thrives in well-drained, fertile soil with a pH between 6.0 and 7.0. Incorporate compost or a balanced fertilizer to enrich the soil. This variety prefers full sun but can tolerate partial shade, especially in warmer climates. Maintain consistent moisture by watering regularly to keep the soil evenly moist without waterlogging.

Plant Details

Botanical Name
Lactuca sativa
Life Cycle
Annual
Sun Requirement
4–8 hr.
Days to Germinate
7–10
Days to Maturity
60–70
Planting Depth
¼ in.
Plant Spacing
8 in.
Ideal Temperature
60–80°F
Frost Hardy
Yes

When to Grow

This lettuce variety is best planted in early spring and fall when temperatures are cooler. It can withstand light frosts, making it suitable for early spring and late fall planting. To extend the growing season, sow seeds every few weeks from early spring through late summer. In warmer regions, providing partial shade can help prevent bolting during the summer. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

How to Sow and Plant

Start seeds indoors 3-4 weeks before the last expected frost date. Sow seeds 1/4 inch deep in seed trays and transplant seedlings outdoors when they have at least two true leaves. Alternatively, direct sow the seeds outdoors as soon as the soil can be worked in spring, placing them 1/4 inch deep as well. Sow in thick bands for baby greens or space 8 inches apart for head lettuce.

How to Grow

Parris Island Cos lettuce grows best in temperatures between 60-80 F. Maintain consistent moisture by watering regularly, and use mulch to retain soil moisture and suppress weeds. This variety benefits from a nitrogen-rich fertilizer, promoting vigorous growth and tender leaves. Regular weeding is necessary to minimize competition from weeds. In hotter climates, providing afternoon shade can help prevent bolting and ensure a longer harvest period.

How to Save Seeds

  • Lettuce is a self-pollinating annual, making it an easy crop for seed saving.
  • Choose the best and healthiest plants and allow them to send up flower stalks.
  • Once seed heads are dried and have turned a yellowish-tan color, cut the entire stalk and place in a bag.
  • Crush the seed heads in the bag and separate the chaff.
  • Store in an airtight container in the refrigerator for up to 4 years.

FAQ

How long does it take for Parris Island Cos lettuce to mature?

This variety typically matures in 60-70 days, with baby greens ready for harvest in about 30 days.

What are the ideal growing conditions for Parris Island Cos lettuce?

This lettuce variety prefers temperatures between 60-80 F and thrives in well-drained, fertile soil with a pH between 6.0 and 7.0. Full sun is ideal, but it can tolerate partial shade in warmer climates. Consistent moisture is crucial for optimal growth.

How should I harvest Parris Island Cos lettuce?

Harvest the entire head when it is firm and fully formed, usually 60-70 days after planting. For baby greens, start harvesting leaves about 30 days after planting. Cut the leaves 1 inch above the base to allow continuous growth.

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