Most feed and seeds in the east sell onion plants in the early spring (Bonnie plants) varieties are limited and not always suitable for the area. As mentioned before , for most states not sharing a border with Canada sets are best for green onions. They are long day onions with a very strong tendency to bolt. Dixondale is the most popular onion vendor.
http://www.dixondalefarms.com/ Brown's Omaha plant farms is also excellent. bopf.com/Oniowww.n-Plant-Varieties/
