I am battling spider mites in my current grow during flower. I used all sort of solutions to start with. I used neem seed oil, insecticidial soap, green cleaners and amazing dr. zymes. All these things actually did more harm than good since they were in the 4th week of flower when I discovered them. Lots of leaves were falling as a result of the treatment solutions and spider mites. So, I looked into biological solutions. I got 1500 lady bugs and 1500 predatory mites. I only released 1/3rd of them in my 2X4 grow room. But these creatures helped me salvage my girls. I have the spider mites problem under control since the last three weeks with the help of ladybugs and predatory mites. They have been a lifesaver.
So if you are in flower, I really suggest you to get some ladybugs and predatory mites, They work for all different kind of pest including thrips, whiteflies and spider mites. Get the special blend predatory mites if you end up getting those. You can order the ladybugs from amazon directly. It’s dirt cheap. I paid $3.99 for 1500 ladybugs and $11 shipping. As for Predatory mites cost a little more around $20 for 2000 predatory mites and $10 shipping. Also order predatory mites from the nature’s good guys website directly rather than from amazon.
Hope this helps.