60-66 Days to maturity. Allium fistulosum. Organic Bunching White Ishikura Onion Seeds. Non-GMO, annual, perennial, organic, open-pollinated, heirloom, cold hardy, bunching onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers. The White Ishikura has received the RHS Award of Garden Merit. It is a favorite for winter harvesting. This Japanese-type bunching onion develops long white-ended stalks lacking bulbs. While it is a perennial, it is most often grown as an annual or biennial. These bunching onions are also known as Welsh onions, meaning ‘foreign’ when introduced to Europe in the Middle Ages.