Maize starts converting sugars into starches the moment it's harvested. That's why fresh-picked is so important: even within a few hours, the flavor changes.
That's also why frozen or canned corn is a good idea: picked at the peak of ripeness and almost immediately has its enzymes deactivated either by freezing or boiling. Aside from texture issues (which won't matter for many applications like soups and smoothies), frozen vegetables and berries have better taste than "fresh" from the produce department for most products, most of the year. Also why so many cooks swear by canned tomatoes for sauces: they're better quality tomatoes picked at peak ripeness, but the only way they can travel is frozen or canned. And nobody freezes tomatoes; it screws up the texture so badly that canning is no worse and possibly better, plus it's expensive to deal with cold chain (whereas a pallet of San Marzano tomatoes can sit on a shelf until it rusts through with little loss of flavor and no maintenance other than the shelf it sits on).
Maize starts converting sugars into starches the moment it's harvested. That's why fresh-picked is so important: even within a few hours, the flavor changes.
That's also why frozen or canned corn is a good idea: picked at the peak of ripeness and almost immediately has its enzymes deactivated either by freezing or boiling. Aside from texture issues (which won't matter for many applications like soups and smoothies), frozen vegetables and berries have better taste than "fresh" from the produce department for most products, most of the year. Also why so many cooks swear by canned tomatoes for sauces: they're better quality tomatoes picked at peak ripeness, but the only way they can travel is frozen or canned. And nobody freezes tomatoes; it screws up the texture so badly that canning is no worse and possibly better, plus it's expensive to deal with cold chain (whereas a pallet of San Marzano tomatoes can sit on a shelf until it rusts through with little loss of flavor and no maintenance other than the shelf it sits on).