Here are some natural recipes for controlling garden pests that you may want to try.
If you have mites, try mixing 4 tablespoons of buttermilk with a cup of all-purpose flour and a gallon of water. This mixture will suffocate the mites.
Crush 3 oz. of garlic cloves and mix with 1 oz. of mineral oil. Let this mixture stand overnight, then strain. Mix 1 teaspoon of fish oil and one tablespoon of castile soap with a quart of water. Slowly combine the garlic mix with the fish oil mix. Then mix two tablespoons of this mixture with a pint of water in a sprayer. This is effective on some insects and mites.
It may be easier to mix one tablespoon of a mild dish soap plus one teaspoon of a vegetable cooking oil with one quart of water. This can be sprayed on all plants. Remember to spray both the top and the underside of the leaves.