As you all know, It’s always recommended to eat the fruits and vegetables that are in season, choosing what is in season can be confusing, for reference here is a rough guide that links on harvesting season to many popular fruits and veggies: 

• Blackberries
• Bell peppers
• Blue berries
• Raspberries
• Brocoli
• Corn
• Cucumbers
• Eggplant
• Green beans
• Nectarines
• Okra peaches
• Pineapple
• Plums
• Summer squash
• Tomatoes
• Watermelon
• Zucchini

And remember that this is the list of the products with the most pesticide residues, try to buy Organic, at least this ones

• Apples
• Celery
• Strawberries
• Peaches
• Spinach
• Nectarines (imported)
• Sweet bell peppers
• Potatoes
• Blueberries (domestic)
• Lettuce
• Kale / collar greens