From what I've experienced the mites may prefer a host plant and mostly ignore the others. By destroying the host you might just encourage them to choose another one. You're early into flower - Hit them with safers soap. Spray the fan leaves and massage it in to ensure you cover the eggs. Can't hurt to add a mulch layer to the top of the soil as well and give it a little spray too. Battled these buggers for most of the summer but eventually got it under control.