Wet hopping or fresh hopping a beer is when freshly picked\undried hops are added to a beer at some point of the brewing, fermenting, or conditioning process. These hops are typically added to the beer within a day or two of being picked to maximize the unique flavors extracted from a freshly picked hop. A fresh or wet hop is typically less predictable than a dried hop and will usually impart a lower amount of bitterness than the same weight of dry hops due to the additional moisture weight in the wet hop.

 

Below is a photo of some cascade hops nearly ready to be picked and used for fresh hopping\wet hopping.

Cascade hops ready to be used for Fresh Hopping or Wet Hopping.

Cascade hops ready to be used for fresh hopping or wet hopping.