Zone 6 Coverage
Planting Timeline — All Varieties
Growing Lettuce & Salad Greens in Zone 6
Zone 6 offers lettuce growers a sweet spot - enough growing season to get multiple harvests, but cool enough springs and falls to keep lettuce happy longer than hotter zones. Your 180-day growing season, stretching from mid-April to mid-October, gives you excellent opportunities for both spring and fall crops, plus the possibility of succession planting throughout summer if you choose heat-tolerant varieties and provide afternoon shade.
The key challenge in Zone 6 is managing the temperature swings. Late spring can still surprise you with unexpected cold snaps, while summer heat arrives fast and can bolt your cool-season crops before you're ready. This makes variety selection crucial - you'll want bolt-resistant types for summer growing and cold-hardy varieties for season extension. The varieties I've selected below have proven themselves reliable performers in Zone 6's variable conditions, offering everything from quick-growing loose-leaf types to substantial heads that can handle light frosts.
Variety Comparison
| Variety ↑ | Days | Difficulty | Size | Type | Indoor | Harvest |
|---|---|---|---|---|---|---|
| Arugula | 21-40 | Easy | 2-4 inch leaves | Heirloom | — | April–November |
| Batavia | 55-65 | Easy to Moderate | 8-10 inches diameter | Heirloom | February–August | May–November |
| Bibb | 55-60 | Moderate | 4-6 inches across | Heirloom | February–August | May–October |
| Black Seeded Simpson | 40-50 | Easy | 6-10 inch diameter rosette | Heirloom | — | May–November |
| Buttercrunch | 60-75 | Easy to Moderate | 6-8 inch diameter heads | OP | February–March | May–October |
| Great Lakes | 85-90 | Moderate | 6-8 inch diameter heads, 1-2 lbs | Heirloom | February–March | June–October |
| Green Leaf | 45-55 | Easy | 6-8 inches across | OP | — | May–November |
| Iceberg | 80-95 | Moderate to Challenging | 6-8 inch diameter tight heads | OP | February–August | June–October |
| Little Gem | 55-65 | Easy | 4-6 inch tall compact heads, individual serving size | Heirloom | — | May–December |
| Mâche (Corn Salad) | 60-70 | Moderate | 1-2 inch leaves | Heirloom | — | October–December |
| Mesclun Mix | 21-35 | Easy | 2-4 inch baby leaves | OP | — | April–November |
| New Red Fire | 50-55 | Easy | 8-10 inches across | Hybrid | — | May–November |
| Oak Leaf | 45-50 | Easy | Individual leaves 4-6 inches long, plants 8-10 inches across | Heirloom | — | May–November |
| Red Leaf Lettuce | 45-55 | Easy | 6-8 inch rosettes | OP | — | April–November |
| Red Sails | 45-55 | Easy | 8-10 inch spread | OP | — | May–November |
| Red Velvet | 45-55 | Easy | Individual leaves 4-6 inches, plants spread 10-12 inches | Hybrid | — | April–November |
| Romaine Cos | 70-85 | Moderate | 10-12 inches tall, 6-8 inches wide | Heirloom | February–March | May–November |
| Salanova Green Crispy | 55-65 | Easy to Moderate | Dense 6-8 inch diameter heads with multiple small leaves | Hybrid | February–August | May–November |
| Salanova Red Butter | 50-55 | Easy to Moderate | 6-8 inches diameter | Hybrid | February–April | May–October |
| Spinach | 40-50 | Easy to moderate | 3-6 inch leaves | Hybrid | — | May–November |
Variety Details
Arugula
This peppery Mediterranean green has become a gourmet staple, offering a distinctive spicy bite that transforms ordinary salads into restaurant-quality dishes. Fast-growing and incredibly productive, arugula thrives in cool weather and can be harvested just weeks after planting. The deeply lobed leaves become more intensely flavored as they mature, giving gardeners control over their preferred spice level.
Batavia
A French heirloom variety that combines the best of both worlds with crispy outer leaves like romaine and tender inner hearts like butterhead. Known for its exceptional heat tolerance and resistance to bolting, making it perfect for summer growing when other lettuces fail. The large, substantial heads provide excellent crunch and mild flavor.
Bibb
A classic American butterhead lettuce developed in Kentucky, prized for its exceptionally tender leaves and sweet, delicate flavor. The small, compact heads form perfect individual serving sizes with butter-soft texture that melts in your mouth. This gourmet variety is favored by chefs and home gardeners who appreciate premium salad quality.
Black Seeded Simpson
A classic loose-leaf lettuce that's been a garden staple since the 1850s, prized for its reliability and heat tolerance. The pale green, frilly leaves have a tender texture and mild, sweet flavor that makes it perfect for cutting repeatedly throughout the season. This dependable heirloom performs exceptionally well in both spring and fall plantings.
Buttercrunch
An All-America Selections winner that perfectly bridges the gap between loose-leaf and head lettuce, offering the best of both worlds. The compact heads feature dark green outer leaves protecting a tender, buttery yellow heart with exceptional flavor and crunch. This reliable performer resists bolting better than most butterhead varieties and handles temperature fluctuations with grace.
Great Lakes
A classic crisphead lettuce that delivers the satisfying crunch of iceberg but with better heat tolerance and garden performance. This reliable variety forms dense, well-blanched heads with crisp, sweet leaves that stay fresh longer than most lettuce types. Perfect for gardeners who want that classic lettuce experience without the challenges of growing true iceberg varieties.
Green Leaf
A reliable, fast-growing loose-leaf lettuce that's perfect for beginners and continuous harvesting. The tender, ruffled green leaves provide mild, sweet flavor and can be harvested leaf by leaf for weeks of fresh salads. This heat-tolerant variety is ideal for succession planting throughout the growing season.
Iceberg
The quintessential American head lettuce that forms tight, dense heads of crisp, pale green leaves with unmatched crunch and refreshing flavor. While challenging to grow perfectly, successful heads reward gardeners with the ultimate salad lettuce that stays fresh for weeks and provides that signature satisfying crunch. This variety requires patience and proper timing but delivers restaurant-quality results when grown correctly.
Little Gem
A compact British heirloom that combines the best qualities of romaine and butterhead lettuce in perfectly sized mini heads ideal for individual servings. These adorable 4-6 inch heads feature crispy outer leaves with sweet, tender hearts that make them perfect for grilling, Caesar salads, or elegant presentation. The space-saving size and quick maturity make Little Gem ideal for small gardens, containers, and succession planting.
Mâche (Corn Salad)
This delicate European green, also known as lamb's lettuce, offers an exceptionally tender texture and mild, nutty flavor that has made it a favorite in fine restaurants worldwide. Incredibly cold-hardy, mâche actually improves in flavor after frost and can provide fresh salads through winter in many climates. The small, spoon-shaped leaves form perfect individual servings and add an elegant touch to any salad mix.
Mesclun Mix
This French-inspired blend of young salad greens offers gardeners the ultimate convenience and variety in one packet, typically including lettuce, arugula, spinach, and herbs. Perfect for beginners who want to try multiple varieties without buying separate seeds, mesclun provides a gourmet salad experience with varying textures and flavors. The mix is designed for cut-and-come-again harvesting, providing weeks of fresh salads from a single planting.
New Red Fire
A stunning loose-leaf variety that adds dramatic color to any garden or salad bowl with its deeply frilled, burgundy-red leaves. Despite its intense coloring, the leaves remain tender and mild-flavored, making it both beautiful and delicious. This heat-tolerant variety maintains its vibrant color even in warm weather when other red lettuces fade.
Oak Leaf
An elegant loose-leaf lettuce with distinctive deeply-lobed leaves that resemble oak tree foliage, adding visual interest to both garden and salad bowl. This heat-tolerant variety offers exceptional flavor with tender, buttery leaves that never become bitter, making it perfect for continuous harvest throughout the growing season. The unique leaf shape and reliable performance make it a favorite among both novice and experienced gardeners.
Red Leaf Lettuce
A stunning loose-leaf lettuce that brings vibrant color to salads with its bronze-red tinged leaves and bright green centers. This fast-growing variety is exceptionally easy for beginners and provides continuous harvests throughout the growing season. The tender, sweet leaves have a mild flavor that appeals to all ages.
Red Sails
An All-America Selections winner that brings stunning burgundy-red color to the garden while delivering exceptional heat tolerance and slow bolting. The deeply frilled, oak-like leaves transition from green centers to brilliant red edges, creating a dramatic visual impact in salads. This variety combines ornamental beauty with practical performance, thriving in conditions that cause other lettuces to struggle.
Red Velvet
A stunning loose-leaf variety that brings dramatic burgundy-red color to the garden and gourmet appeal to the table with its deeply ruffled, almost frilly leaves. This heat-tolerant beauty maintains its vibrant coloration even in warm weather while delivering exceptional flavor with tender, sweet leaves that add both visual impact and culinary excellence to any salad mix. The combination of ornamental beauty and outstanding performance makes it a standout choice for edible landscaping.
Romaine Cos
The classic upright lettuce that forms tall, sturdy heads of dark green leaves with prominent white ribs and exceptional crunch. This traditional variety has been cultivated for over 2,000 years and remains the gold standard for Caesar salads and Mediterranean cuisine. Its robust structure and intense flavor make it indispensable for gardeners who want restaurant-quality lettuce at home.
Salanova Green Crispy
A revolutionary modern hybrid that transforms salad preparation with its innovative multi-leaf technology - one cut at the base yields perfectly sized, ready-to-eat leaves without waste. This compact variety produces dense heads packed with crispy, uniform leaves that maintain excellent texture and freshness longer than traditional lettuce types. Perfect for busy gardeners and commercial growers who want maximum efficiency and consistent results.
Salanova Red Butter
A revolutionary multi-leaf lettuce that produces 16-20 individual leaves from a single cut, making harvest incredibly efficient and waste-free. The tender, red-tinged butterhead-type leaves offer premium texture and sweet flavor while the innovative breeding ensures every leaf is perfectly sized for salads. This modern variety combines convenience with gourmet quality.
Spinach
This nutritional powerhouse is one of the most valuable crops for home gardeners, packed with iron, vitamins, and antioxidants that make it a superfood staple. Cool-weather loving spinach grows quickly in spring and fall, producing tender leaves that are delicious both raw and cooked. Modern varieties resist bolting longer than older types, extending the harvest window for busy gardeners.
Zone 6 Growing Tips
Start your first lettuce seeds indoors 4-6 weeks before your last frost date (so early to mid-March for Zone 6), then transplant seedlings outside 2-3 weeks before the last frost. Lettuce can handle light frost, so don't baby it too much - those April transplants will actually develop better flavor with some cool nights. For direct seeding, wait until soil can be worked in early April, but know that germination will be slow in cold soil.
Succession planting is your secret weapon in Zone 6. Sow new seeds every 2-3 weeks through May, then take a break during peak summer heat (July-early August) unless you can provide consistent shade and water. Resume planting in late August for fall crops - these often outperform spring lettuce because they mature in cooling rather than warming weather. Your fall lettuce can often survive until Thanksgiving or beyond with simple protection like row covers or cold frames.
Summer growing requires strategy: choose bolt-resistant varieties, provide afternoon shade (30-50% shade cloth works well), and keep soil consistently moist but not soggy. Morning sun with afternoon protection creates ideal conditions when temperatures climb above 75°F consistently.
Season Overview
Your April 15th average last frost and October 15th first frost create ideal bookends for lettuce growing, giving you roughly six months of prime growing weather. The generous 180-day season allows for three distinct growing periods: early spring crops (March starts, April-May harvest), heat-tolerant summer varieties (May-June starts, July-August harvest), and the prize fall crops (August starts, September-November harvest). Fall plantings often produce the best lettuce in Zone 6, maturing in September and October's cool nights and mild days, with many varieties surviving well past that first October frost with minimal protection.