The present invention relates to a hybrid Swiss chard seed designated 69-104 RZ. The present invention also relates to a Swiss chard plant produced by growing the 69-104 RZ seed, which plant exhibits a combination of traits including green leaves with a reddish purple petiole and midrib, slow growing, resistance to downy mildew (Peronospora farinosa f sp. betae), a dark to very dark green leaf coloring and strongly blistered leaf blades. The invention further relates to methods for producing the Swiss chard cultivar, represented by hybrid Swiss chard variety 69-104 RZ.
