seed cracked during germination but did not sprout?

sakhalchea

Active Member
I have some choc thai seeds that are 20 years old and the first week, like 4 seeds cracked, second week one seed barely sprouted like 1 seed had a small tail. and week 3 no improvement. and soon headed to week 4. I have my seeds in a bowl with 3 layers of tissue on the bottom and 3 layers of tissue on top of the seeds. and the water i use is rain water. i also put a plastic bag over it and have it sitting on top of my monitor. I dont understand why they crack than no activity after that.
 
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