Iceberg Lettuce Heirloom Seeds

History

Iceberg Lettuce (Lactuca sativa var. capitata) earned its famous name not from its crisp texture but from the way it was originally shipped across the United States in the 1920s — packed in crushed ice to keep it fresh during long rail journeys. Before refrigerated transport, this was a luxury. The variety quickly became America’s most beloved salad green, prized for its tight, crunchy heads and mild, refreshing flavor. This heirloom open-pollinated strain traces back to those classic American varieties — non-GMO, grown the old-fashioned way, and every bit as satisfying straight from the garden as it is on a plate.

Plant Profile

• Days to Maturity: 70–85 days
• Head Size: 6–8 inches in diameter; 1–2 lbs per head
• Color/Appearance: Pale green outer leaves wrapping a tight, dense, creamy white-green interior
• Plant Height: 8–12 inches
• Plant Type: Annual heading lettuce

Flavor Profile

Mild, clean, and refreshingly crisp — iceberg lettuce delivers that satisfying crunch that no other lettuce can replicate. The flavor is delicate and slightly sweet with none of the bitterness found in some romaine or leaf varieties. Excellent raw in salads, wedge salads with blue cheese dressing, tacos, burgers, and wraps. Holds up well after washing and stores beautifully in the refrigerator for up to two weeks.

Growth Type & Harvest Yields

Iceberg lettuce forms a single dense, compact head per plant. Under normal cool-season conditions expect one firm head per plant at 70–85 days; in cool, consistently moist soil with good fertility, heads reach 1–2 lbs each. A 4-foot raised bed row of 6–8 plants delivers a full season of fresh salads for a family of four.

Disease Resistance

• Good resistance to tipburn when grown in cool, moist conditions
• Susceptible to bolting in heat — plant in spring or fall to avoid summer temperatures above 75°F
• Moderately susceptible to bottom rot and lettuce mosaic virus in wet, poorly drained soils
• Avoid overhead watering late in the day; water at the base in the morning
• Rotate lettuce with non-Asteraceae crops annually

Growing Tips & Planting Dimensions

• Spacing: 12–14 inches between plants; rows 18 inches apart
• Sow Depth: ⅛ inch deep (surface sow and lightly press; needs light to germinate)
• Germination: 7–14 days at 45–75°F soil temperature; germination drops significantly above 80°F
• Sun Requirements: Full sun in cool weather; partial shade helps extend season in warmer climates
• Soil: Rich, well-draining, moisture-retentive soil with pH 6.0–7.0; high nitrogen content promotes leafy growth
• Water: Consistent, even moisture is essential — irregular watering leads to tip burn and loose heads
• Special Tips: Start indoors 4–6 weeks before last frost for spring planting; direct sow in late summer for fall harvest; mulch around plants to keep soil cool and moist

When to Plant

Iceberg lettuce is a cool-season crop — plant in early spring (4–6 weeks before last frost) or in late summer for a fall harvest when temperatures are reliably below 75°F. Not sure of your zone? Check the USDA Plant Hardiness Zone Map.

Companion Plants & Mutual Benefits

• Carrots — loosen soil around lettuce roots; the two crops share space efficiently
• Radishes — fast-growing companions that break up soil and deter aphids
• Strawberries — ground cover that keeps soil moist and cool around lettuce
• Chives and garlic — natural aphid deterrents; protect lettuce from common pests
• Tall crops (corn, sunflowers) — provide afternoon shade that extends the cool-season harvest window
• Avoid planting near: fennel (inhibits most vegetables) and celery (competes for the same nutrients)

How to Enjoy

Nothing beats a classic wedge salad — halve an iceberg head, drizzle with blue cheese or ranch dressing, and top with bacon and cherry tomatoes. Shred for fish tacos, burgers, and wraps where crunch is everything. Tear into a simple garden salad with cucumbers, radishes, and a light vinaigrette. Store unwashed heads in a damp paper towel inside a sealed bag in the refrigerator for up to two weeks of crisp freshness.

Why Gardeners Love Iceberg Lettuce

• Classic American crunch — nothing else delivers that satisfying, refreshing bite
• Excellent storage — keeps far longer than leaf or romaine varieties after harvest
• High yield for the space — compact heads make efficient use of raised bed space
• Beginner-friendly — straightforward to grow in cool weather with consistent moisture
• Dual season crop — spring and fall harvests from the same seed packet
• True heirloom — open-pollinated; save seeds from your bolted plants each season

Harvest Tips

• When to harvest: Harvest when heads feel firm and dense when gently squeezed; outer leaves are still tight
• How to cut/handle: Cut at the base with a sharp knife; remove outer damaged leaves; refrigerate immediately for maximum crispness
• Curing & storage: No curing needed; wrap in damp paper towels, place in a sealed bag, and refrigerate for up to 2 weeks

Seed Saving

Allow one or two of your healthiest plants to bolt and flower in late spring or summer. Seeds mature inside small dry seed heads on tall flowering stalks — shake stalks over a paper bag to collect seeds. Dry thoroughly for 1–2 weeks and store in a labeled airtight container in a cool, dark location. Iceberg lettuce seeds remain viable for 3–5 years under proper conditions.

Order Today

Grow the crispest, freshest iceberg lettuce you’ve ever tasted — right in your own raised bed. Order your Iceberg Lettuce heirloom seeds today and bring the classic American salad green home to your garden.