Lettuce Matilda Bibb Organic Seeds offers a premium, heat-tolerant Dutch Bibb variety that forms beautiful, softly folded heads of sweet, buttery leaves. With a delicate texture and delicious flavor, this lettuce thrives in cool spring weather and can handle the warmer temperatures of early summer. Sow seeds in finely worked, well-drained soil in full sun, about 1/4 inch deep and 2 inches apart, with rows spaced 6 to 8 inches apart. Keep soil evenly moist and thin out seedlings gradually, leaving 10 to 12 inches between each plant to allow room for the heads to mature. For a continuous harvest, make several sowings 10 days apart before the heat of summer arrives, and plant again in late summer for a fall crop. Lettuce thrives in cool conditions with consistent moisture, so keep plants well-watered and spaced correctly to prevent overcrowding. If birds are a problem, cover seedlings with floating row covers or netting. As your plants grow, enjoy tender young thinnings in salads, and harvest mature heads when they are firm and well-formed. Avoid letting plants bolt in hot weather, as the leaves become bitter at this stage.