Red Cross Onion Sets Produce Large Bulbs With Deep Red Skin And White Flesh with Clearly Defined Red Rings. over Winters Well And Stores For Up To 3 Months.excellent Choice For Slicing And Salads.special Note By Planting Your Onion Sets In The Autumn You Can Guarantee The Earliest Crops Next Year. These Ensure That You Have A Tasty Home Grown Crop From Late Spring To Early Summer.