Looks like evidence of some kind of critter infestation to me.
What strain are you growing? I'm assuming it's all one strain (and from the same mother plant), so you don't have to worry about what to do if/when one of the inner plants ends up being ready for harvest first.
What strain are you growing? I'm assuming it's all one strain (and from the same mother plant), so you don't have to worry about what to do if/when one of the inner plants ends up being ready for harvest first.