The best Narcissus variety for cultivation in the United States is the 'Dutch Master.' This variety is renowned for its vibrant colors, strong stems, and long-lasting blooms. The 'Dutch Master' Narcissus features large, cup-shaped flowers with a distinctive central cup, which adds to its visual appeal. According to a study published in the Journal of the American Society for Horticultural Science, 'Dutch Master' Narcissus has consistently ranked high in terms of flower quality and longevity, making it a top choice among gardeners. The study also noted that this variety is highly resistant to pests and diseases, which is a significant advantage for gardeners looking for low-maintenance plants.