What Affects Hairiness?

I was just wonderin why some buds are really hairy and others ( like mine ) are .... well... just not. can the hariness be afected by sunlight exposure and other such things ?

yours seems to still have a long time left. how many days into flowering is that?

oh not that long thats an old pic bout 2 weeks old

dont worry them there hairs will be smokable. what varity.

1 word: genetics

Genetics does play a part yes,but make sure you dont use a nute that has a high nitrogen level during flowering,also a plant will put out more leaves if its not getting much or enough light