Have you looked at pics out there?
https://www.google.com/search?...
I think this is my fav pic:
http://www.growsonyou.com/phot...
Those should help you place it regarding appearance, but I have no idea what's going on under the ground with these.
There's a teeny-tiny one in a raised planter on my front porch that has survived temps in the teens under a sheet. The first time was a few weeks ago, and it's happened a couple times. Both times it was below freezing for about 48 hours. No sign of any damage yet.
What do you get where you are? A very occasional, very light frost?