how to get rid of spider mites on my boxwood shrubs
You will need to buy a miticide product such as Avid or Floramite. They can be expensive though. So you can go on Ebay and get smaller amounts at very reasonable prices for the home gardener. Regular insecticides and some products that say they are insecticides and miticides combined will not work. Use of insecticides only can make the problem worse by killing off all natural enemies of the mites.