Are you sure thats a spider mite problem?? I know it was just an educated guess from the pics without actually seeing the underside of leaves.. But a few of my plants had developed a few similar little white spots, but i had no S/mites, it was just like a light few speckles here n there on a few leaves, and it wasnt a nute issue i dont think cos it was a potting mix blend i make and hadnt been hit with any nutes yet, just what i watered the soil with 2 days previous to planting- Nitrosol think it was called,had 12% N,and P,K plus trace elements, at half strength. How old are these girls of yours? Unless its all over your plant and its affecting its growth you should be alright. BUT check for any pests anyway-better to be safe, and check ur soils ph. If she's on nutes, maybe back em off a little see if any change?? Hope this helpd..Goodluk andHappy Harvesting