An apparatus and method to regulate the fluid level in a plant watering device is described. In an embodiment, the plant watering device comprises a fluid reservoir that is supported by an adapter/fluid regulator that sits within a hollow permeable plant stake. The plant stake is designed to be pressed into soil adjacent to a plant growing in the soil. The adapter sits within the plant stake and acts as a valve with a variable settings that controls the depth of water in the plant stake. Exposing the permeable plant stake to various levels of water affects the rate of permeation through the stake and thereby regulates the watering rate for the plant.
