US-11350581-B2

A pollination machine (10) with improved cross-pollination abilities may feature a plurality of pollen recirculation chambers with an air circulation manifold (130A, 131A, 133A, etc.) connecting them in a manner that air in one chamber (30A), together with associated pollen, is removed from the one chamber and redirected to a second (30B), and so on until air is returned to the first (30A). The chambers' initial roller entrances (118) will serve to trip blossoms and release both pistol and pollen but a current in the air circulation manifold contains and will deposit foreign pollen grains on the plants' stigmas before they are inundated by the blossoms' own pollen. The air current also collects the plants' pollen and carries it to other chambers so that other plants will be cross-pollinated.