According to this onion catalog I received they list some for our area. (Ohio) Here they are and storage time. Big Daddy 4-6 mths, Copra 10-12 mths, First Edition 10-12 mths, Red Zeppelin 6-8 mths, Sterling 6 mths. According to the catalog Walla Walla is only 1 mth. Hope that helps. I got this free catalog from Dixondale Farms. Info for planting time, types of onions and what grows best in different areas. I think they deal mainly with onions. Alot of useful info.