Possible Solutions, but no Expert:
One problem could be too wet Soil, but the other can also be that theyre old Seeds i recall.
Sometimes when seeds are not quiet dead, but the resting stored Energy is pretty low, they often make it till they have two leaves, but around then energy runs out.
But thy also could be very adapted to a certain Soil.
I heard they were passed on alot in Hawaii before they came to us, so if theyre adapted, then probably to Hawaiian Soil, and i heard this Third Case, where someone grew a Strain wich grew in Swamp, and he managed to find Soilcomposition and imitated it, and then it worked.
However in his Case (swamp-strain) his plants looked a bit bigger than one Week, and therefore i tend to think its either low stored energy or Adaptation. (wet soil i dont think cause the other Person who has those seeds had same problem, and bouth people overwatering ? unlikely)
The germination tutorial would eliminate the Low-stored-energy Problem
