When will Silkie and Maran Lay?

[UrbanChickensRUs]

I know that there is a large amount of variability between individual birds, but in general, at what age to Silkies and Marans start laying? Are they some of the later or earlier varieties?

 

[bigspringshatchery]

My marans didnt lay till around 7 months plus. I started to think they would never lay.