I have outdoor grow in soil and now have spider mites
Just me, but IF I was going to use a “natural” repellent/pesticide like that one, in view of its instructions to basically foliar drench the plant, I would make my own… in large quantities… like gallons.
You could buy the active ingredients and mix up a super concentrate for storage to save room. Then simply dilute a given measure in a gallon of RO/DI water for application.