PRODUCT INFO Thai sour mangoes, like mentioned above, are typically unripe or young mangoes. sour mangoes for their refreshing/tangy taste which usually come with a firm, crisp, crunchy texture which is very different from ripe mango. Sour mangoes can be consumed on their own, paired with seasoning/dips or turn into a dish. SEASON Sour mangoes typically, late May thru June.