How to Grow Green Head
Wikimedia Commons
Green Head
Lactuca sativa var. capitata
vegetableGreen Head is a crisphead lettuce variety that forms dense, compact heads with tightly wrapped leaves and a pale, tender interior. It's a cool-season crop valued for its crisp texture and mild flavor, making it ideal for salads and fresh eating. This variety is reliable and widely grown in home and commercial gardens.
When should you plant Green Head in your zone?
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Example Green Head timeline · Pittsburgh, PA (Zone 6b)
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Plant Green Head
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 Green Head
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Green Head dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-9; grows year-round in mild climates, best as spring/fall crop in hot regions
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Get my Green Head timeline →Growth Stages
Seedling
10-14 daysTiny cotyledons emerge, followed by first true leaves. Plant is delicate and low-growing.
Keep soil consistently moist. Provide bright light if growing indoors. Thin seedlings to proper spacing once true leaves appear.
Vegetative/Leaf Development
20-30 daysPlant develops multiple layers of outer leaves. Leaf count increases, but head has not yet begun to form or is very loose.
Maintain consistent watering and light. Apply balanced fertilizer every 2-3 weeks. Thin plants if overcrowded.
Head Formation
15-25 daysOuter leaves begin to curl inward and overlap, forming a loose head that gradually tightens. Inner leaves remain pale and tender.
Ensure adequate spacing to prevent disease. Continue consistent watering. Reduce nitrogen fertilizer to prevent excessive leaf growth at expense of head density.
Head Maturity
10-15 daysHead is solid, compact, and dense with a firm feel when gently squeezed. Outer leaves are medium green; inner leaves are pale and crisp.
Maintain steady moisture without overwatering. Monitor for bolting in warming temperatures. Harvest when head feels firm but before outer leaves yellow.
Harvest/Over-maturity
1-7 days before bolting beginsFully formed head ready for harvest. If left unharvested, lettuce bolts (sends up flower stalk), becomes bitter, and is no longer usable as salad lettuce.
Harvest immediately when mature to prevent bolting and maintain quality. Cut at soil line with sharp knife or pull entire plant.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or neem oil; introduce ladybugs; use row covers on young plants; strong water spray to dislodge
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and
Hand-pick early morning or evening; use beer traps; diatomaceous earth barriers; copper tape around beds; remove debris and mulch that provide hiding spots
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Use virus-resistant varieties; control aphids (primary vectors); remove infected plants immediately; sanitize tools
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Improve air circulation; avoid overhead watering; apply sulfur or copper fungicide; choose resistant varieties; remove affected leaves
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Use row covers on seedlings; neem oil spray; diatomaceous earth; strong water spray; remove weeds that harbor beetles
Uses
Fresh salads and sandwiches
CulinaryThe crisp, tender leaves of Green Head lettuce are ideal for fresh garden salads, sandwiches, and wraps. Its mild flavor pairs well with various dressings and toppings. [source]
Spring greens and salad mixes
CulinaryYoung, tender inner leaves can be harvested at any stage for mixed green salads and baby salad blends, offering versatility in harvesting timing. [source]
Food storage and preservation
HouseholdWhole heads store exceptionally well in refrigeration, providing a reliable fresh vegetable supply throughout the cool season and reducing food waste. [source]
Sustainable gardening staple
HouseholdAs a cool-season crop, Green Head lettuce extends the growing season in spring and fall, maximizing garden productivity and reducing dependence on store-bought produce. [source]
Pollinator and beneficial insect support
WildlifeIf allowed to bolt and flower, lettuce plants produce small flowers that attract pollinators and beneficial insects, supporting garden ecosystem health. [source]
Harvest Tips
Harvest when heads feel firm and compact but before bolting begins (typically 60-80 days after transplanting). Cut heads at soil line with a sharp knife in early morning when leaves are crisp and full of moisture. For longer harvest, pick outer leaves individually while allowing inner leaves to continue growing, though Green Head is primarily grown for full head harvest. Store in refrigerator crisper drawer for up to 2 weeks.
Fun Facts
- 🌱 Crisphead lettuce (iceberg-type) was developed in the late 1800s and became popular due to its excellent shipping and storage qualities, making it ideal for commercial distribution.
- 🌱 Lettuce is over 95% water, making it extremely low in calories while providing fiber, vitamins A and K, and folate—a nutritional staple for health-conscious gardeners.
- 🌱 The name 'iceberg' or 'crisphead' comes from the practice of shipping lettuce packed in ice, keeping it fresh and crisp during long-distance transport to markets.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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