Yes it’s ready. Or it looks like it from the picture. See how the pistils that were white have turned dark? Without a jeweler’s loupe to look at the trichomes, when the pistils are 70-90% brown is a good time to harvest. It’s ok if it’s not exact. Also, if you are growing in soil, and the soil is dense (because the plants not drinking as much water) is a sign of readiness. Another is the leaves around the calyxes and the big fan leaves will turn yellow and curl upward. Hope that helps.