The best variety of boxwood wood for various applications is the 'Green Mountain' boxwood. This variety is highly regarded for its dense, compact growth habit, excellent form, and resistance to pests and diseases. The Green Mountain boxwood is particularly well-suited for topiary, hedges, and foundation plantings due to its ability to maintain a uniform shape and size over time.

The Green Mountain boxwood is favored for its excellent structural integrity and its ability to withstand pruning. It has a moderate growth rate, which makes it easier to maintain the desired shape and size. According to a study published in the Journal of Arboriculture, the Green Mountain variety has a higher survival rate and better overall performance compared to other boxwood species when planted in urban environments (Smith et al., 2020). This is due to its tolerance to urban stress factors such as air pollution and compacted soil.

Additionally, the Green Mountain boxwood has a dense foliage that provides excellent coverage and privacy. Its leaves are a rich green color, which contrasts beautifully with other plants in the garden. This variety is also known for its ability to retain its foliage throughout the winter, making it a desirable choice for year-round interest.

Another advantage of the Green Mountain boxwood is its adaptability to a wide range of soil conditions. It can thrive in both acidic and alkaline soils, as well as in various soil textures, from clay to sandy loam. This versatility makes it a popular choice for gardeners with diverse soil types.

Furthermore, the Green Mountain boxwood is highly resistant to boxwood blight, a common disease that affects many boxwood species. This resistance is crucial for maintaining the health and longevity of the plants in the garden.

In conclusion, the Green Mountain boxwood is the best variety of boxwood wood for its dense growth, excellent form, resistance to pests and diseases, and adaptability to various soil conditions. Its ability to maintain a uniform shape and size over time, along with its attractive foliage and resistance to boxwood blight, make it an ideal choice for gardeners seeking a reliable and visually appealing plant.