A device facilitating water or liquid fertilizer distribution to a plant growth medium by wicking from a tube that accepts a separate and removable liquid reservoir. The tube is closed at the bottom and accepts the outlet of the external reservoir. The tube is inserted into the top surface of the plant growth medium so that the wick emerges from the tube above the top of the plant growth medium and contacts it. As liquid is transferred by the wick, the liquid level in the tube drops below the opening of the reservoir outlet, allowing air to enter the reservoir from the bottom and more water to flow from the reservoir into the tube. The characteristics of the wicks can be adjusted by the user to change the water flow rate and water distribution pattern to accommodate the needs of individual plants.