Abstract: A device and method for supporting and fertilizing trees or plants, are provide. The device includes (a) a base element having walls defining a cavity for holding a releasable fertilizer therein, the walls being formed with at least one opening for releasing the releasable fertilizer, the base element being shaped and designed insertable into a ground through the ground's surface; (b) a pole being connected to, or integrally formed with, the base element through a first end of the pole; and (c) a plant engaging mechanism being connected to, or integrally formed with, the pole, the plant engaging mechanism being of a length such that a terminal end of the plant engaging mechanism is less than 50 cm away from the pole, such that when the device is used for supporting a plant, the base element is positioned less than 50 cm away from the plant, so as to provide for efficient fertilization of the plant by the releasable fertilizer.