Hop pellets are prepared from whole leaf hops which have been hammer-milled into a powder and the subsequently pressed through a conventional pellet die. Hop pellets retain all of their natural vegetative and lupulin material and can be used as a full replacement for leaf hops in the brewing process.
Leaf hops are the dried and pressed natural inflorescence's of the female hop plant. During harvest, these inflorescence's or "cones" are removed from the plants, dried and pressed into bales on the farm. They are supplied to brewers as whole or part bales ready for immediate use.