Will a male in flower for 10 days have viable pollen?

As the thread title says, will a male in flower for 10 days have viable pollen? I sexed some plants for 10 days in a flower tent.
Did I just completely fuck up? They are out now. @BobBitchen @Mohican

Viable pollen when they open and spit everywhere

they should be about ready to open anywhere from 10 to 20 days of flower.
I wait until they start to open, then collect the dumping pollen on a mirror.