Abstract: A cost effective high efficiency automatic plant cloning system which provides for accelerated plant shoot propagation is disclosed. A water and nutrient re-circulating system that is controlled off and on provides plant shoot immersion wetting and drying cycles. Plant shoots are supported in porous fibrous plant shoot medium that is placed in water and nutrient conducting channels where the water and nutrient in the on cycle contact and repeatedly wet the plant shoot and its emerging root structure. The porous fibrous plant shoot medium also provides for the growing plant shoot to expand without any hindering of the plant shoot and emerging root structure.