40-60 Days to maturity. Allium fistulosum. Ishikura Winter Long Japanese Bunching Onion Seeds. Non-GMO, annual, perennial, open-pollinated, heirloom, cold hardy, bunching onions. Suitable for growing in greenhouses, garden plots, raised beds, and containers. A vigorous and hardy winter variety, this bunching onion has hollow stalks and an excellent, mild flavor. It is frost tolerant, pest resistant, and bred to grow well in most areas. It is also delicious for microgreens. Bunching onions are perennials but are generally treated as annuals or biennials.~ 8,375 seeds / oz.