I did not. This spot was supposed to have sweet corn. My Father in law added some fertilizer not sure what...probably 10-10-10. He never did plant the corn, so I planted the brassicas.
Visited my throw and grow plot. The PTT look like they are turning brown, but the rape and radish looks green still. Are the PPT more sensitive to cold?
Could likely be a combination of all three. Did you notice anything out of the ordinary before the cold set in. Anything going on with the foliage? Some type of powdery mildew or something of that nature on the leaves maybe? If you don't plan to already, I would rotate that area completely out of brassicas for next season just in case you have the start of some disease issues going on in there.
May not be that issue then, you would have likely noticed it for sure. You still might want to consider rotating that area into soybeans or something else and putting your brassicas in elsewhere, maybe where your beans are at now?
Not sure if it is viable in the photo. The darker green grass on the right is in the seed bank. The lighter green to the left is the rye grass...at least that is where buck on bag seed was planted.