Short day onion. A yellow, intermediate variety described as a "hard, tough onion". This variety resembles "Yellow Sweet Spanish" in most characteristics. Tops are large and non-glaucous. Bulbs are globe to high-globe, very hard, and have a smooth, tan scale. Bulbs are firmer than most Sweet Spanish cultivars, and matures 3-4 weeks earlier than the Utah strain of "Yellow Sweet Spanish". Its handling characteristics have generally been rated high. It has excellent tolorance to pink root disease. NuMex Sundial can be used for spring-seeding, but will produce larger bulbs if fall-seeded. From fall-seeding, it produces excellent yields of large onions. Spring-seeded yields are somewhat less than other spring-seeded intermediates, and tends to produce small-medium sized onions.