Buzzy® Organic Onion Rijnsburger 5 – suitable for long-term storage. Buzzy Organic Seeds are high-quality, organically grown vegetable seeds. In one season, Rijnsburger 5 yellow onion seeds grow into large onions that are ideal for storage. Yellow onions are indispensable in the kitchen and very healthy. Add them to soup and stews, salads, burgers and tacos. Which recipe is not complete without onion? Store the onions in a cool, dark and dry place after harvesting.