Abstract: A plant watering reservoir has a container having a container sidewall. Sidewall openings are formed on the container sidewall. The sidewall openings are large enough to allow passage of water. A cavity section is formed within the container. The cavity section includes an air cavity having air and superabsorbent polymer hydrogel loaded into the cavity section. A solid vertical column is formed between columns of vertical sidewall openings. A solid horizontal column is formed between rows of horizontal sidewall opening. The superabsorbent polymer hydrogel is loaded to a loading amount of less than full volume when the superabsorbent polymer hydrogel fully engorged.