JN Strain Musclewood

Botanical Name: Carpinus caroliniana ‘JN Strain’™

Alternate Name: American Hornbeam

The JN Strain Musclewood is a tree that was selected from the North American Musclewood – Carpinus caroliniana – for improved, radiant fall color, improved vigor, as well as tolerance for heavier clay and alkaline soils. It was developed by Johnson’s Nursery in Wisconsin.

The JN Strain Musclewood is an elegant, small, deciduous tree that grows to a height and width of 25-30 feet. This tree has a broadly oval growing habit with dense branching characteristic of most hornbeams. Carpinus caroliniana ‘JN Strain’™ makes a perfect specimen tree for smaller landscapes. It also works well as a street tree under power lines. Its dense branching provides deep shade.

The leaves of Carpinus caroliniana ‘JN Strain’™ are dark green, small, and toothed. In the fall the foliage gives a blazing display of mostly orange and red with some yellow highlighting tones. The bark of JN Strain Musclewood is an outstanding smooth, pale gray, which makes a statement in the winter months when the leaves are gone.

The JN Strain Musclewood produces both male and female catkins. The male flowers are drooping catkins which are orange-brown in color, and the female flowers are green catkins. The fruits are small nutlets that turn bronze and brown as they mature. The catkins and fruits are eaten by wildlife such as songbirds and squirrels.

Category:

Height: 25-30 ft.

Width: 25-30 ft.

Shape: Broadly oval

Flower Color: Brown (male), green (female)

Flowering Time: April-May

Fall Color: Orange-red, yellow

Features: Superior fall color

Exposure: Full Sun to Part Shade

Watering: Moderate & Regular

Soil: Prefers rich, moist, well-drained soil, with a pH between 5.0-7.4 (tolerant of mildly alkaline soils)

Growth Rate: Slow

USDA Zones: 4-8

Uses: Hedge, shade tree, street tree, screen, understory tree, wildlife garden

Similar trees: Carpinus betulus 'Frans Fontaine,' Carpinus betulus ‘Fastigiata’