Marshall Lettuce is an heirloom cultivar of Lactuca sativa that thrives in zones 5 through 9, reaching a compact 9 inches tall and ready to harvest in just 65 days. This upright loose-leaf variety was discovered in Massachusetts before 1900 and became a commercial staple in the Pacific Northwest until virus pressures forced it from cultivation, making its return through virus-free USDA germplasm stock a genuine restoration of gardening heritage. It grows best in full sun with moderate water and slightly acidic to neutral soil (pH 6.0 to 7.0), and it blooms in June and July, thriving in maritime climates where cool seasons keep its leaves tender.
Full Sun
Moderate
5-9
9in H x ?in W
—
High
Hover over chart points for details
Marshall is a living piece of American agricultural history, rescued from obscurity and reintroduced through virus-free stock preserved at the USDA germplasm repository in Corvallis, Oregon. This June-bearing heirloom produces leaves with the tenderness and flavor that made it legendary among Pacific Northwest growers, and its compact, upright habit means it fits neatly into smaller garden spaces while still delivering substantial harvests. The variety's reputation for excellence earned it recognition from food connoisseur James Beard, who called it the most delicious strawberry ever grown, a testament to the quality standards this heritage line maintains.
Marshall Lettuce is grown for fresh salads and as a cutting lettuce, where individual outer leaves can be harvested repeatedly while inner leaves continue growing, extending the season's productivity. The tender, flavorful leaves work beautifully in mixed greens applications and are particularly suited to dishes where delicate texture matters. Its June and July bloom timing and preference for maritime climates make it especially valuable for cool-season salad gardens where heat-tolerant varieties struggle.
No timeline data available yet for this variety.
Start seeds indoors 4 to 6 weeks before your anticipated transplant date. Sow at a shallow depth and keep soil consistently moist but not waterlogged until germination.
Transplant seedlings outdoors after they have developed 2 to 3 true leaves. Space loose-leaf varieties like Marshall at 10 to 14 inches apart within rows set 16 inches apart. Harden off seedlings gradually before transplanting to reduce transplant shock.
Direct sow seeds outdoors as soon as soil can be worked in spring. Use row cover immediately after sowing to prevent soil crusting and improve germination rates. Keep soil moist until seedlings establish. For extended harvest, succession plant every 2 to 3 weeks during cool seasons.
Begin harvesting individual outer leaves once the plant has developed enough foliage to spare them without compromising growth. Harvest by picking outer leaves first, allowing the inner leaves to continue expanding and providing multiple picks from a single plant throughout the season. For the whole-plant harvest, cut the lettuce about 1 inch above soil level, which may allow for regrowth in cool seasons. Check plants daily as they approach maturity, as all lettuce eventually becomes bitter as it begins to bolt. In June and July, when Marshall naturally blooms, monitor plants closely and harvest promptly before heat triggers bolting and flavor deterioration.
Enter your ZIP code to see a personalized growing calendar for this plant.
“Marshall has roots in Massachusetts, discovered sometime before 1900 and later adopted as a commercial variety in the Pacific Northwest, where it became a mainstay of local agriculture through the early 1960s. Its productivity and flavor made it invaluable to regional growers until virus infections began decimating commercial plantings, leading to its replacement by modern disease-resistant varieties and its near-disappearance from cultivation. The variety's resurrection came through the USDA germplasm repository in Corvallis, Oregon, where virus-free stock was maintained and propagated, allowing home gardeners and heritage seed companies to restore this nearly-lost cultivar to gardens. This journey from discovery to commercial success to near-extinction and finally to preservation represents the critical work of seed banking in keeping agricultural diversity alive.”