Great Lakes 118 lettuce is a variety of crisphead lettuce known for its large, crisp heads and heat tolerance. This cultivar was developed in the 1960s as an improvement over the original Great Lakes variety, which itself was bred in the United States for larger and firmer heads compared to earlier European crisphead lettuces. Great Lakes 118 is celebrated for its resistance to bolting and tip burn, making it a reliable choice for gardeners and farmers looking for a lettuce that performs well under varied conditions, particularly in early spring and late fall when temperatures are optimal for its growth. Its origin story highlights American agricultural innovation aimed at enhancing lettuce for commercial and home cultivation.