When do trichs come?

In my third week of flowering, onto fourth week, White Skunk. I see trichs already, and am wondering when they really start to explode, about which week. Thx

From hear on they will start poping up more and more. The last few weeks they really explode with them.

Alright thanks, yeah this is my first indoor, they already have a fair amount, I hope these next few weeks fly by!!