Some say wait till trichs are 10% amber and the rest cloudy and from what u say your girl has been in flower for about 10 weeks depending on the strain which u don’t know so’s kind of hard to say when she could be ready. I have two stavia girls at the moment and they've just entered their 12th week of flowering and have no amber trichs yet. Myself I just go by the hairs, once they are 80& brown/orange I pull her. Waiting for the amber trichs and all that is said to get u the best stone from your grass, guess it boils down to whatever floats Ur boat. No matter what am sure it will be a nice little smoke and just think with a little more attention it could have been even better, enjoy the smoke