Is it okay to grow loofah in the oil drum on the roof?

According to the growth law of vegetables, cut oil drums with a certain height are selected and filled with native vegetables. Generally speaking, the soil layer needs 15cm, which can be cut from 4/5 of the oil drum, and the lower or upper part can be kept or completely cut. The humidifier is inverted at the bottle cap, and the water layer is generally about 3cm high, which can keep the soil moisture. You can also cut only a part, fasten it when planting, and punch a few small holes in the upper part to increase humidity and temperature.