Now for the controversial part: WARNING THIS IS MY OPINION ONLY, and this is what *I* would do. I do not recommend that anyone else be insane enough to actually do this (wink wink, nudge nudge, now what I mean, know what I mean?).
I would consider using Avid (Abamectin). Yes, it is not approved for use on commercial weed in Oregon, but... it has been used effectively by growers for years, and it breaks down in UV light. If I was growing outdoors AND my plants were not in flowering stage yet, AND I had an active infestation, AND I was not a commercial grower, I would consider it. Mites can be nearly impossible to eradicate once they take hold. I have had more experience with spider and cyclamen mites, but they are very similar.
The great advantage of Abamectin is that it is translaminar. Meaning that it will enter leaves and move through them in a systemic fashion. It will also stay in the leaves that it was sprayed on and not move to new leaves on the plant. As such, I can miss parts of the leaves and still get full efficacy of the tiny little fuckers. I just do not process or smoke any fan leaves and only harvest and cure the flowers. UV light also breaks down Abamectin in a few days time at most (it has a half life of 4-6 hours). Once it dries after contact, it is safe to touch. The reason that Abamectin gets a bad wrap is that the label says, "harmful if inhaled". Well, duh! That is only referring to the spray itself.
Abamectin (also called avermectin) is actually a naturally occurring substance derived from soil bacteria. It is approved for a wide range of edible vegetable crops if applied at least a week before harvest. It is also approved for hops up to a month before harvest. Labs tests in Santa Cruz, CA that tested weed sprayed with Avid found zero residual Abamectin after 45 days of application. Cornell Univ. states: "Abamectin is subject to rapid degradation when present as a thin film, as on treated leaf surfaces. Under laboratory conditions and in the presence of light, its half-life as a thin film was 4 to 6 hours".
But the hysteria is out there in heaps about using this stuff, as there is with Raw Neem and Aza. Given the facts and actual evidence, this is what *I* would do, and not what I recommend anyone else do. Wink wink... If my plants were indoors, I would put them outdoors to spray, let them dry, and then move them back indoors. Avid and Neem/Aza are also most effective if applied 2 or 3 times at the intervals of the particular mites' life cycles. Spider mites in winter cycle every 7-10 days, so I would repeat at 7 day intervals for those. Broad mites have 4-7 day life cycles, so I would repeat in 4 day intervals. Russet mites have an 8-15 day life cycle, so I would repeat every 8 days.
BTW, I have lots of fresh raw Neem and Abamectin if you need any.
That's touching a sore spot here in Oregon. Abamectin was found in a bunch of "organic" rec flower. A product called guardian had abamectin in it but not on label. Was a natural product; or so people thought.
No wonder it worked so well.
Yes it works. Yes it breaks down in UV. After 45 days post app tested zero.(ran pesticide panel) I wanted to know so ran a test.
Lots of resistant mites out there. You are supposed to switch products.
Spary Avid. Then Floramite. Then Avid.
But on a food type crop this is very controversial. I will say it works.