Organic Guide: Dirty Dozen & Clean 15Recipes / Toolkit DIRTY DOZEN // CLEAN 15 Dirty Dozen These fruits and vegetables are highly sprayed with pesticides, always buy these organic. Apples Celery Strawberries Peaches Spinach Nectarines Grapes Sweet Bell Peppers Potatoes Blueberries Lettuce Kale / Collard Greens Clean 15 (Low Pesticide / Conventional Okay) Onions Corn (non-gmo & organic is still better choice. Pineapple Avocado Asparagus Sweet Peas Mangoes Eggplant Cantaloupe Kiwi Cabbage Watermelon Sweet Potatoes Grapefruit Mushrooms