When is it ready to harvest?

You're a couple weeks out yet pal. Lots of ripening yet to be done.. Pull back on your nutrients and start giving more water feeds as this will help ripening and make sure she gets through it smoothly without overfeeding. You can always add but once given its hard to take back. Over feeds are just as none during ripening. Its a balancing act. Your nutrients should be telling u to be using (so, whatever they say) generally you use 1-2/1-3, or 4-600 ppm.. Sugars, pk boosters (ripening) enhancers.

I agree with asnoriu, 10-14 days at the most.

i see no ambers ;))) would say 10-14 days max.