Eryngium yuccifolium - sorry, but I choke on the common name for this one, can't even say it :)

If you are in an area of the country that is experiencing early Spring, you could be pushing the moist cold requirement. These are probably going to need minimum of 4 weeks moist chill (approx 40ish)....how are your nights doing for chilly if your days have warmed up some. Our springs are so cool I think I could do it here, our days are barely getting to upper 50's on a GOOD day - but if you live where people have been experiencing 60's, 70's, you might want to use your refrigerator for a month or more then sow and place outside. (a tiny zip lock with a tsp or two of sterile moist sand or sterile moist vermiculite takes up very little space, then sow contents of the bag - sand and all - when ready)

Mine sure did, but I winter sowed in December the year I started them.