week 10 yellow leaves

Hi guys week 10 already im growing in soil the strains are AK48 cheese and church but iv noticed the leaves are very yellow limp and thin as paper is this normal ? By the way the trics ate about 10/15% cloudy so not quite there on that front

pics would be a great help. need to know were the yellowing started ect. and as much info as can always helps fellow growers help you.