Botanical Name: Fraxinus pennsylvanica ‘Cimmzam’
Alternate Name: Cimmaron Green Ash, Cimmzam Ash
The Cimmaron Ash (Fraxinus pennsylvanica ‘Cimmzam’) is a fruitless male cultivar of Fraxinus pennsylvanica. It is an exceptional tree for landscapes. It is attractive and cold hardy with a uniform growth pattern. It is a medium sized deciduous tree that grows to a height of 50 feet, with a spread of 30 feet.
The Cimmaron Ash has well-spaced, strong, and upright limbs that make it a popular shade tree choice for larger landscapes. This cultivar’s reliable growth pattern and open, rounded canopy, also make it suitable for use as a street tree.
It is late to leaf out in the spring and also holds onto its leaves longer into the winter than other species. Its leaves are pinnately compound and dark green with lighter undersides. It provides a stunning fall display when its leaves turning brilliant shades of orange and red.
The flowers are yellow, green, and inconspicuous. The bark is an attractive gray brown color, which develops fissures as the tree matures.
Cimmaron Ash is tolerant of cold, heat, and high winds. It is also moderately resistant to drought and urban conditions, as well as salt tolerant.
Height: 40-50 ft.
Width: 25-30 ft.
Shape: Rounded, Oval, Pyramidal
Flower Color: Yellow-Green
Flowering Time: May
Fall Color: Red, Orange
Features: Attractive fall color, uniform structure
Exposure: Full Sun to Light Shade
Watering: Moderate & Regular
Soil: Prefers rich, moist, and well-drained soils. Tolerant of dry and wet soils and various pH
Growth Rate: Moderate
USDA Zones: 5-8
Similar Trees: Fraxinus americana 'Junginger' (Autumn Purple® Ash), Fraxinus excelsior ‘Aureafolia' (Golden Desert® Ash), Fraxinus oxycarpa 'Raywood' (Raywood Ash), Fraxinus pennsylvanica 'Patmore' (Patmore Ash)