Fraxinus pennsylvanica ‘Cimmzam’ – Cimmaron® Ash

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
Uses: Specimen tree, shade tree, lawn tree, park tree, street tree, habitat tree
Similar Trees: Autumn Purple® Ash (Fraxinus americana ‘Junginger’), Golden Desert Ash (Fraxinus excelsior ‘Aureafolia’), Raywood Ash (Fraxinus oxycarpa ‘Raywood’), Patmore Ash (Fraxinus pennsylvanica ‘Patmore’)

Additional information


Oval, Pyramidal, Rounded

Flower Color

Green, Yellow

Flowering Time


Fall Color

Orange, Red

Growth Rate



Habitat Tree, Lawn Tree, Park Tree, Shade Tree, Specimen Tree, Street Tree

USDA Zones

5, 6, 7, 8

Mature Height


Mature Width



Full Sun, Partial Shade

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