A planting pot includes a straight cylinder part and a diameter-enlarged part. The diameter-enlarged part has a first end and a second end. The first end is connected to the straight cylinder part. The second end is opposite to the first end. An outer diameter of the diameter-enlarged part is gradually increased in a direction from the first end to the second end. A planting holding plate includes a plate body and a plurality of planting pots. The planting pots are connected to the plate body, and the planting pots are arranged at intervals.
