The best organic spray to use for all your plant needs is Garrett Juice, I recommend it and have been using it for years. Try this easy recipe:)
Garrett Juice (ready to spray): Mix the following in a gallon of water: 1 cup compost tea or liquid humate 1 ounce of liquid molasses 1 ounce apple cider vinegar 1 ounce liquid seaweed For Garrett Juice Plus and more fertilizer value add: 1 - 2 ounces of liquid fish (fish hydrolysate) per gallon of spray For disease and insect control add: ¼ cup garlic tea ¼ cup garlic/pepper tea 1 - 2 ounces of orange oil or 1 tablespoon of BioWash For homemade fire ant killer called Mound Drench add: 2 ounces of orange oil per gallon of Garrett Juice To avoid burning plant foliage, the ready-to-use insect control solution should not have more than 2 ounces of orange oil per gallon of spray. Garrett Juice Concentrate: Mix the following: 1 gallon of compost tea or liquid humate, 1 pint liquid seaweed, 1 pint apple cider vinegar, and 1 pint molasses. To make Garrett Juice Plus add 1 pint fish hydrolysate. Use 1½ cups of the above ingredients per gallon of water for the ready-to-use spray.