It's a long, slow journey for these tough little seeds to produce their first leaf. Keep your seeds in a box somewhere, and don't worry about constant temperatures or your germination mix drying out a little. They will sprout in one's and two's over the space of many months, perhaps even a year or more. Being adjacent germinators, they produce a bud which seems to linger for many weeks before pushing out a tiny leaf spear. From bud development, to a fully emergent leaf spear may take 2 or 3 months, yet the roots at this stage are often no more than a few millimetres in length.