Had a ziplock bag of HT Seedling x Carefree Copper seeds on top of fridge, thinking I’d let them stay at room temperature for a few days before putting them in the crisper, which is my normal practice. After a short amount of time, I noticed something green had poked itself through the paper towel the seeds were wrapped in. One of the seeds germinated almost as quickly as a radish seed. So now, I have a lone seedling to nurse along through the winter in my zone 5 home.
PS Thank you Larry Davis for the Carefree Copper pollen this spring.