Hello

I planted Walla Wallas and Pattersons from bunches ordered from Territorial Seeds. They've been in the ground maybe 5 weeks, and the tips of many of the leaves are starting to turn yellow, spread downward and die. I don't think that I've seen this before with onions, and it doesn't seem normal. I've done some research, and it just doesn't seem like any fungal disease that I read about. I live in wet Oregon and the springtime has not dissapointed this year, just in case rain factors in here. Thanks for your time :)