A new and distinct variety of Gardenia plant, referred to by its cultivar name, ‘;WAH-SG’;, is provided which forms single, small sized, fragrant, white colored inflorescences. Attractive, glossy, dark green colored foliage is formed, which contrasts beautifully with the blossoms. The vegetation is moderately vigorous and the growth habit is tight, compact, and rounded. The new variety is well suited for proving attractive ornamentation in the landscape.