How to Grow Great Lakes Lettuce
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Great Lakes Lettuce
Lactuca sativa var. capitata
vegetableGreat Lakes is a classic crisphead (iceberg-type) lettuce variety known for its large, dense, pale green heads with excellent crispness and mild flavor. This heirloom variety has been a gardening staple since the 1920s and remains popular for both home gardeners and commercial growers. It produces firm, tightly wrapped heads that store well and maintain quality after harvest.
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Example Great Lakes Lettuce timeline · Pittsburgh, PA (Zone 6b)
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Plant Great Lakes Lettuce
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Great Lakes Lettuce
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Great Lakes Lettuce dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; best in cooler seasons (spring and fall)
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Get my Great Lakes Lettuce timeline →Growth Stages
Seedling
2-3 weeksTiny seed germinates in 7-10 days, developing cotyledons and first true leaves
Keep soil consistently moist but not waterlogged. Provide bright light immediately to prevent leggy growth. Thin seedlings to prevent crowding
Vegetative Growth
4-5 weeksPlant develops multiple outer leaves, establishing a rosette pattern. Foliage is bright to medium green
Ensure consistent watering and steady fertilization with balanced or nitrogen-rich fertilizer. Maintain cool temperatures (55-70°F ideal). Thin to proper spacing to allow head formation
Head Formation
3-4 weeksOuter leaves begin to curl inward, creating the characteristic tight head structure. Head becomes progressively denser and paler at center
Continue consistent watering without flooding. Monitor for pests and diseases. Avoid overhead watering which promotes fungal issues. Apply mulch to retain moisture
Heading
1-2 weeksHead develops fully with tightly wrapped pale green outer leaves and crisp, light-colored interior leaves
Reduce nitrogen to prevent excessive leafiness. Maintain cool temperatures. Check firmness by gently pressing the head
Harvest Ready
Ready to pickHead feels firm and dense when gently squeezed. Outer leaves remain crisp and turgid; head has characteristic size (6-8 inches diameter)
Harvest in early morning when heads are fully hydrated. Cut just above soil level with sharp knife. Quality and crispness are optimal when harvested promptly
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with strong water stream; use insecticidal soap or neem oil; introduce ladybugs; avoid excessive nitrogen
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Hand-pick at night; use copper tape barriers; beer traps; encourage natural predators; remove hiding places
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Remove affected leaves; use row covers; sticky traps; parasitic wasps; spinosad spray as last resort
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Yellow sticky traps; reflective mulch; neem oil spray; insecticidal soap; maintain good air circulation
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Plant in spring or fall; provide afternoon shade; mulch to keep roots cool; harvest promptly before bolting
Uses
Fresh salads and sandwiches
CulinaryGreat Lakes lettuce's crisp, mild-flavored leaves are ideal for mixed green salads, wedge salads, and sandwich bases. The sturdy head holds up well to dressings and toppings without becoming limp. [source]
Cooked greens and soups
CulinaryWhile typically eaten raw, Great Lakes lettuce can be braised, wilted in soups, or used in cooked dishes. The tender inner leaves work well in light cooking applications. [source]
Dietary fiber and minerals
MedicinalLettuce provides dietary fiber, vitamins A, K, and C, plus minerals like potassium and manganese. The crisp leaves are naturally low in calories, supporting digestive health. [source]
Edible packaging and presentation
HouseholdLarge lettuce leaves can be used as edible wraps or serving vessels for appetizers, grain bowls, or as elegant plating garnish in culinary presentations. [source]
Pollinator and predatory insect habitat
WildlifeIf allowed to bolt and flower, lettuce provides early-season nectar and pollen for bees and beneficial insects. Flowering plants also attract parasitic wasps that prey on garden pests. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest in the early morning when heads are fully hydrated and crisp for best texture and flavor. Cut the entire head just above soil level with a sharp knife when it feels firm and dense (approximately 70-80 days from planting). Outer leaves can be harvested individually for earlier use. Great Lakes stores exceptionally well in the refrigerator for 2-3 weeks or longer; wrap in plastic to retain moisture.
Fun Facts
- 🌱 Great Lakes lettuce was developed in the 1920s and became the standard American iceberg lettuce, earning its name from the Great Lakes region where it was widely grown and shipped
- 🌱 The tight head structure and pale interior of crisphead varieties like Great Lakes is due to the outer leaves shading and blanching the inner leaves, which is why they're notably crisp and mild
- 🌱 Great Lakes lettuce contains about 95% water, making it extremely low in calories (roughly 15 calories per cup) while providing excellent hydration and fiber
Gardening Terms
New to gardening? Learn about terms used in this guide:
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