I'm very happy with my Walla Walla onion trial this year. The plants, ordered in February, received mid-March, and planted in early April, did very well for me.
According to the Dixondale day-length map, I'm in the middle of the intermediate-day section. I went with the long-day onions because most of those varieties have a longer storage time. The storage potential of the Walla Walla, at approximately one month, is the shortest of those I grew this year. Knowing this, I've been using them fresh out of the garden for the past couple of months. The tops were the first to fall over, so I harvested the rest of the Walla Walla onions a couple of weeks ago.
The Walla Walla were one-third of a long-day sampler bunch, supposed to do ok here if planted early enough. Despite pulling some for fresh use throughout the latter part of the summer, after trimming and curing I ended up with almost 14 pounds of Walla Walla onions. I've been using the smaller and thick-necked ones in daily cooking, and hung the rest in a net bag in the pantry for short-term storage. Even though they have a rather thin wrapper layer, they should keep until the tomatoes and tomatillos are ready to start canning sauce and salsa.