Netherland Bulb Company Dutch Onion Sets, Onion Allium cepa ‘Stuttgarter Riesen’. These onions are resistant to bolting and are very long keeping. Sets produce onions that will store all winter. Dutch onions are much easier to grow than growing onions from seed. Light Requirements: Full Sun, Plant Height: 12-16 Inches, Bloom Time: Harvest summer, Hardiness Zone: 3-9.
Zone 9, Zone 3, Zone 4, Zone 5, Zone 6, Zone 7, Zone 8