Abstract: A pneumatic seedling transplanter comprising a beating plate for a tray of seedlings to be planted in which the tray has open portions below the seedlings and the bearing plate has at least one opening which can be aligned with the open portions of the tray to permit a seedling to be dropped from the tray through the opening in the bearing plate, a guide tube below the opening in the bearing plate for guiding a dropped seedling downward to be planted, and a source of suction selectively applicable to the guide tube as an impulse of suction to quickly release the seedling to be planted from the tray and induce the seedling to fall through the opening in the bearing plate and into the guide tube and to continue to fall through the guide tube under the influence of gravity, the source of suction including first and second annular chambers, and a vacuum chamber in communication with the guide tube, whereby expansion of one of the annular chambers expands the vacuum chamber to create the impulse of suction and exp