Some choose to harvest the top buds up to 14 days before taking the rest of the plant :) it should be. With more THC in your top bud than the rest of the plant (that's something I've heard and seen and I know it works) but I would like you to try to hear from others before you take the top :) otherwise, just try, you only get smarter by trying it yourself! I think! Good grow
Nicogreen