Question

Generally, grapes which appear in the market during December and January are sour. However, in March-April the grapes are sweet. Why is this so?

Answer 1

Grapes available in December–January are usually less ripe and contain more acids, so they taste sour. As they receive more sunlight and heat during the following months, they ripen and more sugar is formed and stored in them. Therefore, grapes available in March–April taste sweeter.