The best Ginkgo variety for cultivation in the United States is the 'Autumn Gold'. This variety is renowned for its exceptional yellow foliage, which turns a brilliant gold in the fall, making it a favorite among gardeners and landscape designers. The 'Autumn Gold' Ginkgo is also highly resistant to pests and diseases, which contributes to its popularity.

The 'Autumn Gold' Ginkgo stands out due to its consistent performance in various climates across the United States. According to a study published in the Journal of Arboriculture, this variety has shown remarkable adaptability, with a high survival rate and minimal maintenance requirements. Additionally, the 'Autumn Gold' Ginkgo has a relatively fast growth rate, reaching a height of about 30 to 40 feet within 20 to 30 years, which is ideal for many urban and suburban landscapes.

The data from the study also highlights the 'Autumn Gold' Ginkgo's ability to thrive in a wide range of soil types and pH levels, making it a versatile choice for different regions. Furthermore, its male gender ensures that it does not produce the notorious foul-smelling seeds that can be a concern with other Ginkgo varieties.

In conclusion, the 'Autumn Gold' Ginkgo is the best variety for its consistent color, disease resistance, adaptability, and fast growth rate. These qualities make it an excellent choice for enhancing the aesthetic appeal of any landscape while minimizing maintenance efforts.