Green Velvet boxwood is one of the most popular boxwoods in North America. It forms a full, rounded mound of rich green leaves that hold their color well through cold winters, which is exactly what gardeners in northern regions want from an evergreen shrub. It is widely used for low hedges, foundation plantings and neat, rounded accents.
This hybrid boxwood was bred to combine the cold hardiness of Korean boxwood with the fuller, more classic look of common boxwood. The result is a tough, adaptable shrub that grows well across a wide range of climates. It is easy to find at garden centers and has become a standard choice for hedges in the northern and central United States and Canada.
Botanical Classification
Green Velvet belongs to the box family, a small group of evergreen shrubs that also includes pachysandra and sweet box. It is a hybrid between Korean boxwood and common boxwood. This cross gives it both the winter toughness of its Korean parent and the dense, rounded form of its European parent.
It is one of a group of hybrid boxwoods developed in Ontario, Canada, that also includes Green Mountain, Green Mound and Green Gem. These plants are sometimes called the Sheridan hybrids, after the nursery that introduced them. Each has a slightly different shape and size, but all share good cold hardiness.
Brief History
In the mid-1900s, gardeners in Canada and the northern United States struggled to grow traditional boxwoods. Common and English boxwood often suffered winter burn or died back in harsh northern winters. Breeders in Ontario set out to create boxwoods that could survive these conditions while keeping the classic boxwood look.
By crossing Korean boxwood with common boxwood, they produced several hybrids with excellent cold tolerance. Green Velvet became one of the best known, thanks to its soft, rounded shape and good winter color. Over the following decades, it spread to gardens across North America and is now one of the most widely planted boxwoods.
Also Read: Different Types of Boxwood Shrubs
Identifying Characteristics
Green Velvet has small, oval leaves about half an inch to an inch long. They are rich, medium to dark green with a slight sheen. The leaves grow in pairs on opposite sides of the stem, packed closely together for a full, dense look.
It grows into a rounded, globe-shaped shrub. Most plants reach about 3 to 4 feet tall and wide when mature. It grows at a moderate rate for a boxwood, often a few inches a year, and fills in more quickly than English boxwood.
Its leaves hold their green color better in winter than many boxwoods, though some bronzing can occur in exposed, sunny or windy sites. Like other boxwoods, it produces tiny, fragrant, pale yellow-green flowers in early spring that attract bees.
Landscape Uses
Green Velvet is an excellent choice for low to medium hedges. Its natural rounded shape and dense growth make it easy to keep tidy with light trimming. It is often planted along walkways, driveways and property lines.
It is also popular in foundation plantings, where its compact size fits neatly under windows and along the front of houses. Single plants make attractive accents near doors and steps. It suits formal gardens as well as more relaxed landscapes.
It grows well in large containers and planters, though potted plants need extra protection in very cold winters. Like other boxwoods, it is deer-resistant. All parts of the plant are toxic if eaten, so it should be kept away from pets and livestock.
Growing Considerations
Green Velvet is hardy from about USDA zone 4 to zone 8. It is one of the best boxwoods for the northern United States and southern Canada, and it also grows well in many parts of the Midwest and Mid-Atlantic.
It grows in full sun to partial shade. In colder areas, a site sheltered from strong winter winds and late-afternoon winter sun helps prevent leaf bronzing and winter burn. In warmer regions, afternoon shade helps keep it healthy during hot summers.
Good drainage is essential. Like all boxwoods, Green Velvet can develop root rot in soggy soil. It grows best in loose, well-drained soil enriched with compost. It prefers slightly acidic to neutral soil, around pH 6.5 to 7.0.
Its roots are shallow, so a thin layer of mulch, about 1 to 2 inches, helps keep them cool and moist. Mulch should be kept away from the stems. Water young plants regularly, and give established plants a deep watering in fall before the ground freezes.
Pruning and Care
Green Velvet naturally forms a rounded shape, so it needs only light pruning. Trim it in late spring after new growth hardens. A second light trim in early summer can keep formal hedges crisp.
Avoid pruning in late summer or fall, which can trigger tender growth that is damaged by frost. Thinning a few interior branches each year lets in light and air and helps prevent disease.
Light fertilizer in spring is helpful if growth is weak or leaves look pale. In very cold or windy sites, young plants can be wrapped in burlap for winter to reduce winter burn and protect against heavy snow.
Pests and Diseases
Green Velvet is a tough plant but has some weaknesses. It is very susceptible to the boxwood leafminer, a tiny fly whose larvae tunnel inside the leaves. Infested leaves develop yellow or brown blisters and may drop early. Regular inspection in spring and early summer helps catch problems early.
It is moderately susceptible to boxwood blight, a fungal disease first found in the United States in 2011. Blight causes leaf spots, black streaks on stems and rapid leaf drop. Good spacing, morning watering at the base of the plant and buying from reputable nurseries all help reduce the risk.
Other pests include boxwood psyllids and spider mites. Root rot can occur in poorly drained soils. The invasive box tree moth, whose caterpillars can strip boxwoods of their leaves, has spread across Europe and into parts of North America and should be watched for in late spring and summer.
Green Velvet vs. Other Hybrid Boxwoods
Green Velvet is often compared with its sister hybrids. Green Mountain grows upright into a pyramid or cone shape, making it better suited for taller, formal hedges and accents. Green Mound forms a smaller, tighter mound about 3 feet tall and wide.
Green Gem is the smallest of the group, forming a tight globe about 2 feet tall and wide. It is also more resistant to boxwood blight than Green Velvet. For gardeners who want a full, rounded hedge about 3 to 4 feet tall, Green Velvet remains one of the most reliable choices.
Green Velvet vs. English Boxwood
Green Velvet and English boxwood are both used for hedges, but they suit different gardens. Green Velvet is much hardier and grows faster, making it better for northern climates. English boxwood grows extremely slowly and does best in milder regions.
English boxwood is also more susceptible to boxwood blight. For gardeners who want a classic boxwood look in a cold climate, Green Velvet is often the more practical choice.
Sources
Cornell University, “Woody Plants Database: Boxwood”
North Carolina State University, “Susceptibility of Commercial Boxwood Cultivars to Boxwood Blight”