The best variety of winter jasmine for American gardens is 'Jasminum nudiflorum 'Sundance'. This variety stands out due to its early blooming, vibrant yellow flowers, and cold-hardiness, making it an excellent choice for regions with harsh winters. According to a study published in the Journal of the American Society for Horticultural Science, 'Sundance' winter jasmine has been consistently rated highly for its ability to thrive in a wide range of climates and soil types, as well as its resistance to pests and diseases. Its early flowering period, which can start as early as January, adds a welcome splash of color to the dormant garden landscape.