Neem oil may be ok for veg, dont use it on flowers (CVS/CHS), look it up, read it and make your own choices.
I use Captain Jacks or Spinosad, both are natural and claim to be safe up to harvest. I used the Captain Jacks after 2 treatments 3 days apart there is no sings of any mites left. I then did a third treatment (3 more days) with the Spinosad (also kills gnats).