100-110 Days to maturity. Allium cepa. Early White Grano PRR Onion Seeds. Non-GMO, annual, open-pollinated, heirloom, bulbing, short-day onion. Suitable for growing in greenhouses, garden plots, and raised beds. Resistant to Pink Root Rot. Cultivated and bred by the Texas AM Agricultural Experimental Station, Early White Grano PRR onion seeds are a sweet, white cultivar of the famous Texas Early Grano 502. This large Vidalia-style onion has been bred for its tolerance to PRR or Pink Root Rot which is known to heavily affect onions. May be grown in short or intermediate-day regions. ~7,000 seeds per ounce.