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Fraxinus pennsylvanica 'Cimmaron'

Fraxinus pennsylvanica 'Cimmaron'

Deciduous · Full Sun / Part Shade

Mature size: 12m–15m high × 8m–12m wide

  • Deciduous
  • Full Sun / Part Shade
  • Mature height12m–15m
  • Mature width8m–12m
  • Frost Hardy
  • Flowers

Prized for the evenness of its crown, which lets a planted row grow up matched, and for orange to brick red autumn colour that holds on the tree later into winter than most other ash.

Regular price $280.00
Sale price $280.00 Regular price
Tax included. Shipping calculated at checkout.
Pot size
Available batches
Size: 40cm/45L
Current height guide
Please enquire
Pot size
40cm/45L

Approximate only. Minimum height important? Confirm with us.

Height guide & disclaimer

Height guide disclaimer: Height ranges are approximate only. As living products, plant heights naturally vary between individual plants, batches, and seasons. No guarantee is given that supplied plants will fall within the stated range. If minimum heights are required, you must confirm current batch heights with Evergreen Trees Direct prior to purchase. Variation in height is normal and is not grounds for return, refund, replacement, or compensation.

Quantity

Order multiple sizes

Mix pot sizes and batches in one order.

Size / batchEachQuantity
40cm/45LApprox. height: Enquire for current heights$280.00
100LApprox. height: Approx. 1.6m – 4m$690.00
200LApprox. height: Approx. 2.3m – 3.6m$1,120.00
700LApprox. height: Approx. 3.6m – 4.5m$7,280.00

Height guide & disclaimer

Height guide disclaimer: Height ranges are approximate only. As living products, plant heights naturally vary between individual plants, batches, and seasons. No guarantee is given that supplied plants will fall within the stated range. If minimum heights are required, you must confirm current batch heights with Evergreen Trees Direct prior to purchase. Variation in height is normal and is not grounds for return, refund, replacement, or compensation.

Subtotal before discounts & delivery$0.00

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    About Fraxinus pennsylvanica 'Cimmaron'

    Fraxinus pennsylvanica 'Cimmaron' is a selected form of Green Ash: deciduous, with a symmetrical, broadly upright crown built on a straight central leader. The glossy dark green pinnate leaves turn orange to brick red in autumn, deeper than the plain yellow of most green ash, and hold on the tree later into winter than most other ash. Small purple flowers open on bare stems in spring.

    It grows in full sun to partial shade and tolerates a wide range of soils, including compacted ground and sites that stay wet for short periods. Frost is not a problem, and established trees handle moderate drought and urban pollution. Growth is moderate to fast at 40 to 60 centimetres a year, with the crown forming evenly.

    Mature dimensions of 12 to 15 metres tall by 8 to 12 metres wide suit parks, wide street reserves, car park islands and large gardens. The even crown is why councils specify it, since a row matches up rather than growing into a mismatched line. For public space it is a low input tree that delivers real shade.

    Also sold as: Cimmaron Ash, Cimmaron® Ash, Fraxinus pennsylvanica 'Cimmzam', and occasionally spelled Cimarron. 'Cimmzam' is the registered cultivar name and Cimmaron is the trade name, so the two refer to the same tree.

    Which ash should you plant? Cimmaron is the one for a matched avenue or street row, because the symmetrical crown means a planted line grows up even. Claret Ash 'Raywoodii' is the choice when you want the deepest purple-burgundy autumn display. Golden Ash gives yellow autumn colour and bright yellow winter stems. 'Urbanite' is the other green ash selection, broader and more pyramidal than Cimmaron.

    Frequently Asked Questions

    About Cimmaron Ash

    What is Cimmaron Ash?

    Cimmaron Ash is a named cultivar of Fraxinus pennsylvanica, the North American Green Ash, chosen for its uniform symmetrical shape and its autumn colour. Where the ordinary species turns yellow, this selection colours orange to brick red. It is a deciduous shade tree used mainly in streets, car parks and public open space.

    Is 'Cimmzam' the same tree as Cimmaron?

    Yes. 'Cimmzam' is the registered cultivar name and Cimmaron is the trade name it is sold under, so Fraxinus pennsylvanica 'Cimmzam' and Cimmaron Ash are the same plant. You will also see it written Cimarron with a single m, which is a common misspelling rather than a different tree.

    How is Cimmaron different from Claret Ash or Golden Ash?

    Autumn colour and crown shape. Cimmaron colours orange to brick red and holds a notably even, symmetrical crown, which is why it is specified for matched avenues and street rows. Claret Ash gives the deepest purple-burgundy autumn display and a broader crown. Golden Ash turns clear yellow and carries bright yellow stems through winter. All three are deciduous shade trees of a similar scale.

    How big does Cimmaron Ash grow?

    It reaches 12 to 15 metres tall with a canopy 8 to 12 metres wide at maturity. That takes several decades in most Australian conditions. It is a genuine shade tree, so it needs open ground and clear airspace, not a courtyard or a narrow verge under powerlines. Site it with the mature width in mind from the start.

    How fast does Cimmaron Ash grow?

    Growth is moderate to fast, around 40 to 60 centimetres a year while the tree is establishing its framework, then slower as it matures. Regular deep watering and a good mulch ring through the first three summers make the biggest difference. On compacted or unimproved ground expect the lower end of that range until the roots spread.

    Is Cimmaron Ash drought tolerant?

    An established tree handles moderate drought and the dry, reflected heat of paved surrounds, which is why it is a common street tree selection. It is not a dry country species though, and prolonged drought without any supplementary water shows up as early leaf drop. Young trees need consistent watering for the first two to three summers.

    Is Cimmaron Ash suitable for street and car park planting?

    It is one of the standard choices for these situations. The symmetrical form means a planted row grows up matched, the trunk lifts to give vehicle and pedestrian clearance, and the tree tolerates compacted soil, pollution and reflected heat. Give each tree adequate soil volume and keep it well clear of underground services and building footings.

    When does Cimmaron Ash colour in autumn?

    Colour comes on through April and May in most districts, later in warm coastal areas. The glossy green foliage moves through orange to a deep brick red and holds for a few weeks before dropping, staying on the tree later into winter than most other ash. Cool nights and a bright, dry autumn produce the strongest colour, while a mild humid autumn gives a shorter, softer display.

    How do I care for Cimmaron Ash?

    Water deeply through the first three summers, mulch widely and keep turf and weeds off the root zone while the tree establishes. Prune in late winter when the branch structure is exposed, removing crossing limbs and lifting the lower branches gradually to the clearance you want. Mature trees need little beyond deadwood removal and clearing the autumn leaf fall.

    Key growing information
    Mature height12m to 15m (approx.)
    Mature width8m to 12m
    PositionFull Sun / Part Shade
    Growth per year40cm to 60cm per year (moderate to fast)
    FrostFrost Hardy
    FoliageDeciduous (Defoliates throughout colder months)
    FormBroad · Symmetrical
    UsesShade Tree · Avenue Planting · Feature Tree · Rural Property Planting · Street Tree
    Foliage

    Deciduous (Defoliates throughout colder months)

    Position
    • Full Sun
    • Part Shade
    Form
    • Broad
    • Symmetrical
    Use
    • Shade Tree
    • Avenue Planting
    • Feature Tree
    • Rural Property Planting
    • Street Tree
    Mature height
    12m to 15m (approx.)
    Mature width
    8m to 12m
    Fraxinus pennsylvanica 'Cimmaron'

    Planting Information

    How To Plant Your Fraxinus pennsylvanica 'Cimmaron'

    Site: Choose a well-drained position in full sun to part shade with room for the canopy to develop.

    Soil preparation: Enrich the planting area with quality compost and aged manure for a strong establishment phase.

    Hole: Dig twice as wide as the root ball and the same depth.

    Planting: Position level with the surrounding soil, backfill gently, firm in, then water deeply to settle the roots.

    Recommended Planting Spacing For Your Fraxinus pennsylvanica 'Cimmaron'

    Hedging and screening: 1 to 1.5 metres apart for a dense informal screen, or 80 centimetres apart for a tighter formal hedge.

    Feature tree: 3 to 4 metres apart to allow the full canopy and form to develop.

    Avenue planting: 3 metres apart for a uniform soft-textured avenue.

    Fraxinus pennsylvanica 'Cimmaron' is expected to grow 40cm to 60cm per year (moderate to fast).

    • Medium Growth Rate
    • Fast Growth Rate

    Long Term Care For Your Fraxinus pennsylvanica 'Cimmaron'

    Watering: Water deeply twice weekly through the first 12 months. Once established, this is drought tolerant and only needs a deep soak during extended dry periods.

    Mulching: Apply a 5 to 7 centimetre layer of organic mulch over the root zone, keeping it 5 centimetres clear of the trunk.

    Pruning: Tip prune in late winter and again in summer to build dense growth. For a formal hedge, light shaping two to three times a year keeps lines crisp.

    Fertilising: Apply a slow-release general-purpose fertiliser in early spring and again in autumn for steady growth and consistent foliage colour.

    Pest and disease: Hardy against most pests and diseases. Occasional inspection in warm humid conditions is all that's needed.

    Planting Your Fraxinus pennsylvanica 'Cimmaron' in Different Soil

    Fraxinus pennsylvanica performs best in free-draining loam or sandy loam with a neutral to slightly alkaline pH. Adaptable to a wide range of soils when drainage is sharp.

    Sandy soil: Free-draining and ideal. Mulch lightly to moderate surface temperature.

    Clay soil: Improve drainage with gypsum and coarse organic compost before planting.

    Loam: The preferred soil for steady root development and consistent growth.

    pH: Neutral to slightly alkaline preferred. Avoid waterlogging at all times.

    Fraxinus pennsylvanica 'Cimmaron'

    Uses in my Garden

    Uses in my Garden

    • Shade Tree
    • Avenue Planting
    • Feature Tree
    • Rural Property Planting
    • Street Tree

    Fraxinus pennsylvanica 'Cimmaron' works in an:

    • Formal Garden – structured, symmetrical design with clipped shapes.
    • Modern Garden – sleek, minimal, and design-led planting.
    • Woodland Garden – layered, naturalistic design under dappled light.
    • Low-maintenance Garden – resilient choices for easy care and year-round appeal.

    Is Fraxinus pennsylvanica 'Cimmaron' Evergreen or Deciduous?

    Fraxinus pennsylvanica 'Cimmaron' is an Deciduous (Defoliates throughout colder months) Tree

    Mature Height & Width

    Mature Height: 12m to 15m (approx.)

    Mature Width: 8m to 12m

    Fraxinus pennsylvanica 'Cimmaron' is expected to grow 40cm to 60cm per year (moderate to fast).

    Growth Rate of Fraxinus pennsylvanica 'Cimmaron'

    Fraxinus pennsylvanica 'Cimmaron' is expected to grow 40cm to 60cm per year (moderate to fast).

    They are considered to have a:

    • Medium Growth Rate
    • Fast Growth Rate

    Frost Tolerance & Ideal Climate to plant Fraxinus pennsylvanica 'Cimmaron'

    Is Fraxinus pennsylvanica 'Cimmaron' frost tolerant?

    Fraxinus pennsylvanica 'Cimmaron' is Frost Hardy – Survives heavy and frequent frost without damage.

    Does Fraxinus pennsylvanica 'Cimmaron' Flower?

    Fraxinus pennsylvanica ‘Cimmaron’ produces small, inconspicuous greenish flowers in spring. These modest blooms sit along the branchlets and play a quiet role in the tree’s seasonal cycle, with the ornamental focus placed instead on its lush summer canopy and brilliant autumn colour.

    Does Fraxinus pennsylvanica 'Cimmaron' flower?

    • Yes - Flowers

    Flowering Period:

    • Spring

    Flower Type:

    • Clustered

    Flower Colour:

    Purple

    Is Fraxinus pennsylvanica 'Cimmaron' an Australian Native Tree?

    No

    Fraxinus pennsylvanica 'Cimmaron' is Native to Native to North America, where Fraxinus pennsylvanica grows along river plains and moist lowlands. ‘Cimmaron’ is a selected cultivar bred for its uniform shape, pest resistance, and extended autumn colour.

    What is the Wildlife Value of Fraxinus pennsylvanica 'Cimmaron' ?

    Its winged samaras provide food for seed-eating birds, while the broad, rounded canopy offers nesting, shade and shelter for small birds. The textured bark and deciduous leaf litter support insects and microfauna, enhancing biodiversity in woodland and large-garden plantings.

    How much Sunlight does Fraxinus pennsylvanica 'Cimmaron' need?

    Fraxinus pennsylvanica 'Cimmaron' will thrive best in:

    • Full Sun
    • Part Shade

    Preferred Soil?

    Fraxinus pennsylvanica ‘Cimmaron’ performs best in well-drained loam or sandy loam soils and prefers slightly acidic to neutral conditions. It may struggle in compacted clay or poorly drained ground unless improved with organic matter to enhance structure and aeration. Keep soil evenly moist during establishment, then shift to deep, occasional watering as the tree matures to support strong branching, reliable vigour and its standout red-orange autumn display.

    Is Fraxinus pennsylvanica 'Cimmaron' Drought Tolerant?

    Is Fraxinus pennsylvanica 'Cimmaron' Drought tolerant?

    As a young tree it requires regular watering, and once established ‘Cimmaron’ develops moderate drought tolerance. It performs reliably in warm, dry and exposed conditions with deep, occasional watering during extended dry spells to maintain canopy density and vibrant autumn foliage.

    Fraxinus pennsylvanica 'Cimmaron'

    Frequently Asked Questions

    What is Cimmaron Ash?

    Cimmaron Ash is a named cultivar of Fraxinus pennsylvanica, the North American Green Ash, chosen for its uniform symmetrical shape and its autumn colour. Where the ordinary species turns yellow, this selection colours orange to brick red. It is a deciduous shade tree used mainly in streets, car parks and public open space.

    Is 'Cimmzam' the same tree as Cimmaron?

    Yes. 'Cimmzam' is the registered cultivar name and Cimmaron is the trade name it is sold under, so Fraxinus pennsylvanica 'Cimmzam' and Cimmaron Ash are the same plant. You will also see it written Cimarron with a single m, which is a common misspelling rather than a different tree.

    How is Cimmaron different from Claret Ash or Golden Ash?

    Autumn colour and crown shape. Cimmaron colours orange to brick red and holds a notably even, symmetrical crown, which is why it is specified for matched avenues and street rows. Claret Ash gives the deepest purple-burgundy autumn display and a broader crown. Golden Ash turns clear yellow and carries bright yellow stems through winter. All three are deciduous shade trees of a similar scale.

    How big does Cimmaron Ash grow?

    It reaches 12 to 15 metres tall with a canopy 8 to 12 metres wide at maturity. That takes several decades in most Australian conditions. It is a genuine shade tree, so it needs open ground and clear airspace, not a courtyard or a narrow verge under powerlines.

    How fast does Cimmaron Ash grow?

    Growth is moderate to fast, around 40 to 60 centimetres a year while the tree is establishing its framework, then slower as it matures. Regular deep watering and a good mulch ring through the first three summers make the biggest difference.

    Is Cimmaron Ash drought tolerant?

    An established tree handles moderate drought and the dry, reflected heat of paved surrounds, which is why it is a common street tree selection. It is not a dry country species though, and prolonged drought without any supplementary water shows up as early leaf drop.

    Is Cimmaron Ash suitable for street and car park planting?

    It is one of the standard choices for these situations. The symmetrical form means a planted row grows up matched, the trunk lifts to give vehicle and pedestrian clearance, and the tree tolerates compacted soil, pollution and reflected heat. Give each tree adequate soil volume and keep it well clear of underground services and building footings.

    When does Cimmaron Ash colour in autumn?

    Colour comes on through April and May in most districts, later in warm coastal areas. The glossy green foliage moves through orange to a deep brick red and holds for a few weeks before dropping, staying on the tree later into winter than most other ash.

    How do I care for Cimmaron Ash?

    Water deeply through the first three summers, mulch widely and keep turf and weeds off the root zone while the tree establishes. Prune in late winter when the branch structure is exposed, removing crossing limbs and lifting the lower branches gradually to the clearance you want.

    Fraxinus pennsylvanica 'Cimmaron'

    Compare sizes side by side

    40cm/45L

    Enquire for current heights

    100L

    Approx. 1.6m – 4m

    200L

    Approx. 2.3m – 3.6m

    700L

    Approx. 3.6m – 4.5m

    Heights are approximate and vary between individual trees.

    Fraxinus pennsylvanica 'Cimmaron' is loved for its Prized for the evenness of its crown, which lets a planted row grow up matched, and for orange to brick red autumn colour that holds on the tree later into winter than most other ash.

    We take pride in supplying A+ grade advanced trees. When stock at our farm is not yet ready, we work with our trusted trade suppliers to source the best available trees for your garden.

    Plant Your Fraxinus pennsylvanica 'Cimmaron' With:

    Enriched Planting Mix (AO Certified)

    Enriched Planting Mix is a certified organic blend of Pure Magic Compost, composted animal manure, gypsum, composted coarse bark and a wetting agent, bagged in 30L. It is built to be dug through existing garden soil at planting time rather than used on its own, and the gypsum is what sets it apart from a plain compost.

    Gypsum helps break up heavy clay so water and roots can move through it, while the compost and manure return organic matter and nutrient to tired ground. The coarse bark holds structure and keeps air around the root zone, and the wetting agent keeps moisture in the soil longer after rain or watering.

    Use it when planting trees, shrubs, roses, fruit trees and exotic garden plants, particularly into clay. Dig a hole twice the width of the pot and 7 centimetres deeper, then mix roughly one third planting mix through the excavated soil. Spread 7 centimetres of that improved soil in the base before setting the plant in.

    Frequently Asked Questions

    About Enriched Planting Mix

    What is Enriched Planting Mix made from?

    It is a blend of Pure Magic Compost, composted animal manure, gypsum, composted coarse bark and a wetting agent. Each part has a job. The compost and manure supply organic matter and nutrient, the gypsum works on clay structure, the bark keeps air around the roots and the wetting agent holds moisture in the soil.

    What plants is it suitable for?

    It suits exotic garden plants, including roses, ornamental and deciduous trees, fruit trees, shrubs and perennials, and it earns its keep most on heavy clay sites. It is a planting mix rather than a potting mix, so its job is improving soil at planting time. Phosphorus sensitive natives are the one clear exception.

    Is it safe for natives?

    No, not for the phosphorus sensitive ones. The composted animal manure in this blend lifts phosphorus well above what Proteaceae such as Banksia, Grevillea, Hakea and Protea will tolerate, and the result can be leaf burn, dieback and plant death. Use the Native Potting Mix for those species, or plant them into unimproved local soil.

    Is it certified organic?

    Yes. It is a certified organic product with no chemical additives, which is why the manure and compost in it are fully composted rather than raw. That makes it sound around fruit trees and vegetable beds, and it means you are adding genuine organic matter to your soil rather than a synthetic conditioner.

    How much do I need?

    Work on roughly one third planting mix to two thirds of the soil you dug out of the hole. For a shrub out of a 200 millimetre pot that is only a few litres. An advanced tree going into a large hole will take considerably more. Judge the quantity by the volume of the hole rather than the size of the plant.

    Can I use it in pots?

    It is not a potting mix and should not be used on its own in a container. The blend is designed to be diluted through garden soil, and used straight in a pot it holds too much water and settles badly. For containers, reach for a premium potting mix, or the native mix if you are potting natives.

    Does it need to be watered in?

    Yes. Water the plant well several hours before you plant it, then water thoroughly again once the hole is backfilled and the soil firmed down. That first deep watering settles the improved soil around the root ball and drives out air pockets. Keep the water up over the first few months while the roots establish.

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