A sustained release irrigation apparatus for effective water management. The sustained release irrigation apparatus includes a reservoir, a support structure, an absorbent surface, a water permeable top layer and a top opening on the water permeable top layer for filling water in the reservoir. The support structure is positioned on the reservoir and designed to support a potted plant thereon. The absorbent surface is positioned on the support structure and includes an absorbent opening. The top opening positioned on the water permeable top layer receives water from a water source and fills water into the reservoir. The water collected in the reservoir flows upwards to the water permeable top layer and then reaches the soil inside a pot thereby making water available to the roots of the potted plant without any wastage.