Oh yeah... you folks get winter there! 

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Well, I just pulled up a calender and they are actually 36 weeks! We brought them home as chicks on May 13, 2017. This is a pic of them the day we got them...You are welcome to join our group of duds! You are not alone and many others have chickens the same age (or older) that are not yet laying. I'm not sure if the public shaming really gets the girls to lay, but one by one the duds of the group have started laying now that days are growing longer.
https://www.backyardchickens.com/threads/a-contest-for-the-duds.1206150/
Also, pics of your pullets might help others help you determine if they look ready to lay. If you are in the northern hemisphere it's still mid-winter with short days, so regular laying (even from your laying birds) might not exactly happen this time of year.
I've seen much debate over layer vs. grower. Personally, I've switched to layer, but I found one that is 18% protein (like grower) so I feel I'm getting the best of both worlds.
Well, I just pulled up a calender and they are actually 36 weeks! We brought them home as chicks on May 13, 2017. This is a pic of them the day we got them...
I'm sure. All my other hens are off laying right now. The only 2 that are laying are 2 of the younger pullets, one is an EE and one is a BO. No other eggs of any color. I do have 2 older EEs that lay brown eggs, but none of them are laying right now.Are you sure your EE isn't laying?
They don't always lay blue/green.
One way to tell for sure:
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/