Abstract: A new and improved apparatus is disclosed to fertilize water passing through an existing irrigation system. The present invention would comprise at least one feeder, which would comprise an outer housing and an inner feeder tube. The inner feeder tube would be accessible via a top-mounted threaded end cap, with a user removing the top-mounted threaded end cap in order to place fertilizer within the inner feeder tube. The inner feeder tube would have holes throughout its length, and with the outer housing connected up to a closed irrigation water line, the fertilizer would be permitted to mix with the continuous flow of water that would pass through the feeder. Water in the entire irrigation system would be designed to pass through an input PVC line into the feeder, pass around and through the feeder tube (thereby picking up and dissolving fertilizer), and then passing through an output mechanism into the regular irrigation line.