To get rid of spider mites use a Mixture of soap and water, you can use dish soap,,dawn may be strong so use that if it doesn't work the first time, preferably the hand soft kind. Just spray it on your garden veggies and roses and any plants that the spider mites seem to be bothering. use it once the first day to see how the spider mites respond, if they are not gone, do it 2x a day until they are gone. If the plant reacts to the mixture, just hose it down, apply the soap solution and then rinse it.
if that doesn't work use this "3-in-1 Insect Disease & Mite Control".