how do bulbocodiums usually grow?

Dear quiet daffnetters,
No mail today (to the tune of “no milk today”) from daffnet, so I’ll send one then.
Being a novice, I am not aware of all the details on growing daffodils. Last fall, I planted about 100 bulbs of bulbocodiums, hoping to be surprised by a sea of yellow petticoats. So far, all I can see are six to eight inch long leaves everywhere. There’s not a bud in sight. Do they come out that much later than the leaves or could it be that they might not come out at all this year? If not, when then?? — I planted them outdoors in a flower bed in September. The leaves began sprouting in November and December, but we have had temperatures around the freezing point since the end of December. N. cantabricus, which I planted adjacent to N. b. consp. has long and droopy leaves, one flower and one bud.
Thanks for your input, Niels