A fertilizer device is described in one example, that is configured to connect to an irrigation system and direct water past fertilizer. The fertilizer device may include a cap rotatably disposed on a base portion. Depending on the rotational position of the cap relatively to the base portion, different amounts of water are directed against or past the fertilizer within a chamber of the device. The device also may include a water path around the fertilizer such that, even if water flow to the fertilizer is cut off, water without fertilizer will still pass through and out of the device.