A seed harvester suitable for removing and collecting seed from plants. The seed harvester includes one or more seed collection assemblies. Each seed collection assembly may include a frame body extending between a forward portion and a rearward portion along a longitudinal axis, at least one seed collection bin supported by the frame body, a support structure having a first end pivotally attached to the frame body and a second end distal from the frame body; and a plurality of fixed projections for contacting the branches to dislodge seeds. The plurality of projections may be attached to the second end of the support structure and extending downward toward the frame body and the at least one seed collection bin may be positioned to receive dislodged seed that fall downward by gravity.