Hydroponic lettuce production in the United States now encompasses a wide spectrum of lettuce types and cultivars. Although there is an increasing amount of diversity in the cultivars being produced in hydroponic greenhouses, Bibb cultivars still occupy a large percentage of the market. They are also often the first crop produced by many beginning growers around the country. While some growers tailor their cultivar selection to seasonal conditions, many growers at a variety of scales produce a single cultivar for the whole year that is adapted to a range of conditions. Both of these production patterns, though, require the growers to be familiar with the growth habits, characteristics, and productivity of the cultivars. This trial was designed to evaluate a selection of Bibb lettuce cultivars through a range of late fall and winter conditions to evaluate their potential for greenhouse growers in the Midwest and northeast. Cultivars were obtained from a variety of seed suppliers to represent a broad selection of cultivars available to lettuce producers.