GardeningVegetable & Fruit How To Grow Big Bulb Onions By P R - June 1, 2013 0 152 FacebookTwitterPinterestWhatsApp LDS Prepper has a great video on how to get your onions to make the biggest bulbs possible. Very interesting. I never knew this. If you are going to grow onions why not grow them as big as you can while you are at it. photo credit LDS Prepper