Choose from our extensive assortment of onion varieties. Texas Early Grano, Yellow Granex and Red Burgundy are all Short-day Onions which need 10-12 daylight hours to trigger bulbing and do best in zones 7-10. Yellow Sweet Spanish and White Sweet Spanish are Long-day Onions which need 14-16 hour days are best suited to zones 1-6. Our third group is Bunching Onions and they can be grown in any zone that receives 8 hours of sunlight a day! A premier online supplier of Onion Seeds, Eden Brothers offers 25 Onion seed varieties for sale. Buy by the bag or in bulk! For larger jobs, contact us for wholesale prices.