Pyrithrum.

You have plenty of time. A doctor doom small fogger bomb. Only took one time to get rid of thrips but 2 may be required. Pyrithrum dissaptes in about 2 hours and no residue. Safe to use a few days before harvestbut I like a week or more. Any all pyrithrum will do even a good spray will knock them back till harvest.

If you go the neem way try Azamax put out by GH. It is neem concentrate and mixes well with water. It will wipe the hell out of thrips and spidermites. Very good in the mother vegg room.

I don't think I would use neem this late because of oily residue.