@needrain
My guess is that you got your Eryngium after all! Perhaps the long period of cold aided in germination. Congratulations!
Sometimes I have a seed that doesn't sprout, so I dump the dirt for re-use. Then later a plant will grow that doesn't look like what I planted. Sure enough, it was the seed in the dirt that I gave up on. Mother Nature can be tricky that way.
Glad it worked out for you!