She's getting there, great job.
But you need to look at the thrichs, to tell if she's ready or not.
Nebula has some great information on when to harvest in some of her awesome tutorials ,check them out.
Worst thing you can do is harvest to early, Your plant is very close though, I just can't see her trichs very well.
Great job with your grow, I'm sure it will be some powerful smoke.