What did you do with it before you planted it? It will need several weeks, maybe month, of winter cold to break dormancy. If it was dried before that it might be even trickier. I put a variety of maple seeds in damp soil in november and they have been sprouting one after another for the past two weeks now

I had both, scarified & stratified the seed. It was in the fridge for over a month. A sprout began to come out of the seed. The sprout was about....1 inch in length.

Then I placed it in a soil mix (from Miracle Gro) and placed it outside. It sat outside for like a few weeks but nada. Then I finally gave up and decided I'd root around through the pot/planter and it looked like it was all dried up.

The funny thing is, I watered it every 2 days so I'm not sure why this happened. Anyways, this time I purchased one of those Jiffy Peat domed planters. Hopefully I'll have better luck with that. :)