I am not hopeful the remaining seeds will grow, but I'm keeping them humid and warm and hoping for the best. I'll give them 2-3 more days to reveal themselves before I clear them out and plant more autoflowers.
I'm not sure what would cause these seeds so much trouble. It's possible they were poorly stored or perhaps contained too much humidity before shipping and froze badly. This has been a very frustrating experience, but in light of how poorly the other seeds fared, I consider myself very lucky Diaz managed to grow in spite of losing her seed casing during germination. She's coming up amazingly now and one can barely tell she had ever been troubled. She's still tiny but (judging from leaf growth) not for long:
Santiago's second set of true leaves are coming in nicely too:
