Just a picture of the Southern Italian Coast which I visited in August:
Lemons, lime and kiwi are categorized as highly alkaline fruits and are therefore non-acidic. Other non-acidic fruits include bananas, cantaloupe, coconot, grapefruit, grapes, watermelon and berries (exceptions are cranberries and blueberries which are classified as acidic).
Apple and orange are non-acidic fruits which we can find in Winter. In addition, in Winter there are a lot of non-acidic vegetables, such as cabbage, carrots, artichoke, pumpkin, lettuce and garlic.