Plant cultivation supporting frame suitable for ultrahigh-density planting of cedrela sinensis and convenient to adjust

The plant cultivation rest comprises a base plate, a supporting frame and cultivation rods, rod sleeves are arranged at the tops of a first supporting rod, a second supporting rod, a third supporting rod and a fourth supporting rod, the cultivation rods are arranged between opposite adapter shafts on the fourth supporting rod and the first supporting rod, and the first supporting rod and the second supporting rod are connected through the adapter shafts. Cultivation rods are arranged between the opposite adapter shafts on the third supporting rod and the second supporting rod; the cultivation rod is of a hollow structure, through holes are formed in the upper surface of the cultivation rod in an array mode, connecting through pipes are fixedly inserted into the odd number of through holes of the cultivation rod between the fourth supporting rod and the first supporting rod, the top ends of the connecting through pipes are communicated and connected with a cultivation ball, the cultivation ball is of a hollow