3072 - Butterking. Giant Heads of Soft, Mellow Flavor. Resistant to Tip Burn! 60 to 65 days. A favorite for more than 40 years, this ultra-adaptable, big-yielding butterhead should be a mainstay of any serious salad lover. Very slow to bolt, this lettuce reaches about 8 to 10 inches high and wide, well-packed with delectable leaves. It is highly resistant to tip burn and never bitter, even when hot weather arrives early and it must finish under less than ideal conditions. Butter King was bred in Ottawa in 1966.