Hens have not started laying yet...should I worry?

[Where The Wild Things Are]

I bought my first chicks in April, they were a few days old. I got Black Stars and Speckled Sussex. Then about 10 weeks later I picked up 3 Black Copper's (they were about 7 weeks old when I got them). My Black Star is laying (she is a machine) and 2 of Black Coppers are laying. But I have yet to see an egg from my Sussex or the smallest of the Coppers. Should I be concerned? It makes sense that they mature at diffrent rates, but I want to make sure there are no underlying problems. Honestly I don't care if they ever lay (I bought them as pets, and their sisters give me more eggs than I could ever eat) I just like to over analyze things

 

[jaj121159]

Give it a month or so when the days start getting longer again or try to give them 12 hours of light per day.

 

[linben]

My specled sussex just now started squatting. No eggs yet but soon! She was born mid March.

 

[Where The Wild Things Are]

Thank you very much for your replies. I just like to worry (then I have something to blame for the gray hair).

 

[swimmer]

My speckled Sussex is behind in egg laying from the rest of the flock.

 

[OrpingtonManor]

I think it's fine. I have 2 Barnevelders who still aren't laying at 31 weeks. Their combs and wattles are starting to grow and get some redness. Your birds are probably just late bloomers.

 

[they'reHISchickens]

Our June hatched blue copper just started laying, and her sister black copper may be close. But, the third black copper
hen is far behind if her comb is any indication. I don't expect anything from her for at very least another month-- maybe 2!
Oh, that means January or February, doesn't it? Then Spring!
Time is flying, we must be having fun!