http://www.durgan.org/ShortURL/?QDFKW 28 September 2008 Spanish Onions dried for storage. Next year as the onions bulge from the ground they will be covered with mulch. I notice the tops stay green longer, hence possibly larger bulbs. As to exposing to Sun to reduce the sting, I have drawn no conclusions, and will pursue the matter no further. http://www.durgan.org/ShortURL/?NSUQX Summary: Onion Growing experience.