White Boston Lettuce Seeds (Butterhead Type) 1760 Heirloom Vegetable. This compact lettuce produces succulent, light green leaves that are very crisp, thick and tender. Slow to bolt. Introduced in the late 1940’s. How to Grow 880 seed/gram. Lettuce is a sun-loving cool weather crop that grows best in organic, well drained soil. Sow as soon as the soil can be worked in the spring, then every two weeks thereafter to ensure a continuous supply. Sow about 3 mm (1/8″) deep in rows 45 cm (18″) apart. An even supply of moisture during the entire growth period is imperative for success. Harvest leaf lettuce by either pulling the entire plant or by cutting leaves from the main stem at least 2.5 cm (1″) above the base – this will allow the plant to sprout new leaves. Harvest head lettuce by cutting the head off at the base just below the lower leaves. Once lettuce bolts (starts to produce a rapidly growing flower stem) leaves become bitter.
