Unharvested means not yet gathered or collected from where it grows. When crops remain unharvested in a field, they're still standing there, waiting to be picked or cut, even though they're ripe and ready.

Farmers work hard all season to grow wheat, corn, vegetables, or fruit, but sometimes crops go unharvested for various reasons. A sudden early frost might damage the plants before harvest begins. Heavy rains could make fields too muddy for equipment to enter. Sometimes there aren't enough workers available to bring in the crops before they spoil.

The word can also describe other things left uncollected or unused. A scientist might discover unharvested data in old research files that no one had analyzed yet. An orchard might have unharvested apples rotting on the ground because more grew than anyone could pick and sell.

Leaving crops unharvested usually means waste and lost opportunity. All that potential food or material just sits there, unused. It's like finishing all your homework but forgetting to turn it in: you did the work, but you don't get credit for it.