A new plant growing assist device, comprising a container, a separator in the middle of the container dividing the container into an upper part and a lower part. The upper part keeps the soil for planting, and the lower part to acts as a water reservoir. The bottom of the container is provided with a snorkel, around the snorkel there is a buckle which is used to connect the snorkel with a raw water pipe. The device allows for rain water and surface vapor which would otherwise evaporate into the air to condense and be returned to the soil for plant use. The several through holes of the separator ensure proper ventilation； the monitoring window makes it possible to observe the water level inside the reservoir, the top of the container is covered to prevent water evaporation, and out-extending holes are provided to allow the roots to extend outside.
