A nut tree pickup and debris separator comprising three separate but serially interconnected stages, each including optimized structural and functional features for nut harvesting. The first stage includes a rotary pickup brush and an endless conveyor. The conveyor is constructed from a plurality of parallel bars with flights therebetween, the rods being arranged in spaced relation to retain nuts and pass debris. The second stage comprises an inclined rotating drum whose sidewall includes a plurality of elongated apertures passing therethrough, sized to retain nuts and pass debris. An inner side of the sidewall has a helical flight, sized, configured, and arranged to convey and tumble nuts and debris through the drum, with debris falling through the apertures. The third stage includes vertically offset, tandem conveyors and a cleaning fan to remove any remaining debris from the nuts as the stream falls from the end of one conveyor onto the other.
