Lettuce Heatwave Blend brings together a choice mix of heat-loving varieties that stay productive, flavorful, and slow to bolt even in warm conditions. This vibrant mix includes crisp green and purple-red types, deep to bright green romaines, oak-leafed and frilled looseleafs, plus bronze-purple fern-leafed lettuces for texture and color. Leaves are mild to sweet with low bitterness, and ready to harvest in just 45–60 days.