A method and means for feeding liquid material to the orifices of a perforated prilling bucket rotating about a vertical axis. The feed material is sprayed through orifices in the bucket wall to form droplets which are solidified to form prills, and the liquid feed is introduced into the prilling bucket in the form of a plurality of annular and laminar streams and each of the streams is directed to vertically separated orifice row zones in the wall of the prilling bucket.