- Mature height
- 12m to 18m (approx.)
- Mature width
- 10m to 15m
Fraxinus pennsylvanica 'Urbanite' is a deciduous Green Ash selection with a dense, upright crown that broadens with age. The pinnate leaves are thick, glossy and dark green, turning bronze in autumn, and they hold on the tree later in the season than most ashes. Purple flowers appear briefly on bare wood in spring.
Selected for hard urban sites, it accepts full sun to partial shade, compacted soil, reflected heat from paving and short periods of poor drainage. It is frost hardy and survives heavy, frequent frost without damage, and established trees take moderate dry spells. Growth is 30 to 60 centimetres a year, and it defoliates through the colder months.
Grown to 15 to 20 metres tall and 10 to 15 metres wide, it belongs in parks, rural driveways, broad street reserves and open institutional grounds rather than small backyards. Contractors reach for it where the soil profile is poor and the tree still has to perform. Given room, it puts large scale shade over difficult ground.
Frequently Asked Questions
About Urbanite Ash
What is Urbanite Ash?
Urbanite Ash is a cultivar of Fraxinus pennsylvanica, the Green Ash, bred specifically for tough urban conditions. It carries thicker, glossier foliage than the ordinary species, a dense upright crown and bronze autumn colour. It is a deciduous shade tree used where soils are compacted, conditions are harsh and a reliable large canopy is required.
How big does Urbanite Ash grow?
Mature size is 15 to 20 metres tall with a spread of 10 to 15 metres, reached over several decades. This is a large tree and the width matters as much as the height when you site it. Keep it away from buildings, boundaries and overhead services, and give it enough soil volume to support a canopy of that scale.
Is Urbanite Ash frost tolerant?
Yes. It is frost hardy and survives heavy and frequent frost without damage, so it suits cold inland towns, the tablelands and southern districts where winters are severe. It is bare through the coldest part of the year, which means frost falls on dormant wood rather than soft growth. Late frost may nip early spring foliage without lasting harm.
Does Urbanite Ash need sun or shade?
Full sun produces the best form, the densest canopy and the strongest autumn bronze, and it is the position to plant into. The tree also grows in partial shade, though the crown opens up and colour is muted. It has no trouble with exposure, wind or the heat reflected off roads and carparks once the root system is established.
Will Urbanite Ash grow in compacted or poor soil?
That is what it was selected for. It performs on compacted urban fill, clay and low fertility ground where many shade trees stall, and it tolerates short wet periods as well as moderate drought. Results are still better with decompaction, a generous planting hole and mulch, so prepare the site properly even though the tree is forgiving.
Is Urbanite Ash deciduous?
Yes. It defoliates through the colder months and stands bare until buds break in spring. Before dropping, the glossy foliage turns bronze and tends to hold on the tree later than other ashes, extending the autumn display. The bare winter canopy lets sun through to buildings and paving underneath, then shades them again over summer.
How do I care for Urbanite Ash?
Water deeply and regularly for the first three summers and maintain a wide mulch ring clear of the trunk. Formative prune in late winter to establish a single leader and lift the lower limbs progressively for clearance. After that, maintenance is minimal: remove deadwood, check stakes and ties are not girdling, and clear leaf litter from drains in autumn.