60-69 Days to maturity. Allium cepa. Barletta Onion Seeds. Non-GMO, annual, open-pollinated, heirloom, small, white, round-bulbing pearl type, short-day onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers. Barletta onions are an Italian cocktail heirloom onion variety that offers smooth, round 0.75-inch bulbs. They are also known as Barletta Baby Pearl Onions, Pearl Onions, or Cocktail Onions. The small white bulbs are often harvested early to make pickled onions. In addition, the bulbs can be harvested for use in soups, sauces, and kabobs. ~9,000 seeds/oz.