110-165 Days to maturity. Allium cepa. Texas Grano 502 Onion Vegetable Seeds. Non-GMO, annual, openn-pollinated, heirloom, short-day onion seeds. A short-day onion that is suitable for planting in early fall where the winters are mild. Popular in the southern US states. Produces a yellow-skinned, 3-4 inch, sweet onion bulb similar to the famous Vidalia onions. A fresh eating type with mild pungency and moderate storage potential (2-3 months). Resistant to Pink Root Rot.