The best Osmanthus variety in the United States is the 'Goshiki' Osmanthus. This variety stands out for its vibrant fall foliage, which turns a stunning mix of gold, orange, and red hues. The 'Goshiki' Osmanthus is also known for its fragrant, sweet-smelling flowers that bloom in the fall, adding a delightful aroma to the garden.

The 'Goshiki' Osmanthus is highly favored due to its adaptability to various climates and soil types, making it a popular choice for gardeners across the country. According to a study published in the Journal of the American Society for Horticultural Science, 'Goshiki' Osmanthus has shown excellent performance in both temperate and subtropical regions, with its ability to withstand a wide range of temperatures and pH levels in the soil. This versatility makes it an ideal choice for both beginners and experienced gardeners looking to add a touch of color and fragrance to their landscapes.

Furthermore, the 'Goshiki' Osmanthus is highly valued for its ornamental qualities. Its dense, rounded shape and attractive foliage make it a standout feature in any garden or landscape. The variety's ability to thrive in both full sun and partial shade further enhances its appeal, as it can be easily incorporated into various garden designs.

In addition to its aesthetic appeal, the 'Goshiki' Osmanthus has practical benefits. Its drought-tolerant nature means it requires minimal watering once established, making it a low-maintenance option for busy gardeners. This variety also has a relatively fast growth rate, allowing gardeners to enjoy its beauty in a shorter period of time.

Data from the United States Department of Agriculture (USDA) confirms the 'Goshiki' Osmanthus as a hardy plant, rated for zones 5 to 9, which covers a significant portion of the country. This wide适应性 ensures that gardeners in most regions can successfully grow this Osmanthus variety.

In conclusion, the 'Goshiki' Osmanthus is the best Osmanthus variety in the United States due to its vibrant foliage, fragrant flowers, adaptability, and ornamental value. Its ability to thrive in various climates and soil types, coupled with its low maintenance requirements, makes it an excellent choice for gardeners seeking a visually stunning and aromatic addition to their landscapes.