Content Detail

The Patriot elm has excellent resistance to Dutch elm disease (DED), excellent resistance to elm leaf beetles, and some resistance to elm yellows. This complex hybrid is fast-growing, vigorous, and easily established. It has glossy green foliage with yellow fall color. It is useful as a street, parkway, or shade tree.

  • Family (English) Elm
  • Family (botanic) Ulmaceae
  • Planting site City parkway, Residential and parks, Restricted sites, Wide median
  • Tree or plant type Tree
  • Foliage Deciduous (seasonally loses leaves)
  • Native locale Non-native
  • Size range Large tree (more than 40 feet)
  • Mature height 40-50 feet
  • Mature width 30-40 feet
  • Light exposure Full sun (6 hrs direct light daily)
  • Hardiness zones Zone 5 (Northern Illinois), Zone 6 (City of Chicago), Zone 7, Zone 8, Zone 9
  • Soil preference Moist, well-drained soil
  • Tolerances Alkaline soil, clay soil, Dry sites, Occasional drought, Occasional flooding, Road salt, Wet sites
  • Season of interest early fall
  • Flower color and fragrance Inconspicuous
  • Shape or form Oval
  • Growth rate Fast
  • Transplants well Yes
  • Wildlife Migrant birds
  • Has cultivars NA

Native geographic location and habitat:

The Patriot elm is of hybrid origin.

Bark color and texture:

Bark is gray, ridged, and furrowed.

Leaf or needle arrangement, size, shape, and texture:

Leaves are simple, alternate, and 3 to 4 inches long with toothed margins. Leaves are medium green in summer, changing to yellow-green in fall.

Flower arrangement, shape, and size:

Flowers appear in early spring but are inconspicuous.

Fruit, cone, nut, and seed descriptions:

Seeds are contained in small oval samaras (seed case with wings) for wind dispersal.

Plant care:

Do not prune elm trees between mid-April and mid-October, as the open cuts may attract the elm bark beetle.

List of pests, diseases,  tolerances and resistance:

Susceptible to elm leaf miner and verticillium wilt. This hybrid shows excellent resistance to Dutch elm disease (DED), and to elm leaf beetles, with some resistance to elm yellows.


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