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 street, parkway, or shade tree.
All Common Names:
- Residential and parks,
- City parkway,
- Wide median,
- Restricted sites
Tree or Plant Type:
- Deciduous (seasonally loses leaves)
- Shade tree,
- Large tree (more than 40 feet)
- Full sun (6 hrs direct light daily)
- Zone 5 (Chicago),
- Zone 6,
- Zone 7,
- Zone 8,
- Zone 9
- Moist, well-drained soil
- Dry sites,
- Occasional drought,
- Wet sites,
- Occasional flooding,
- Alkaline soil,
- Clay soil,
- Road salt
- Fall color
Season of Interest:
- Early fall
Flower Color & Fragrance:
Shape or Form:
- Migrant birds
Tree & Plant Care
Do not prune elm trees between mid-April and mid-October.
Disease, pests, and problems
Elm leaf miner and verticillium wilt.
Disease, pest, and problem resistance
This hybrid shows excellent resistance to Dutch elm disease (DED), excellent resistance to elm leaf beetles, and some resistance to elm yellows.
Native geographic location and habitat
Of hybrid origin.
Bark color and texture
Bark is gray, ridged and furrowed.
Leaf or needle arrangement, size, shape, and texture
Simple, alternate leaves, 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
Inconspicuous flowers in early spring.
Fruit, cone, nut, and seed descriptions
Seed in small oval samara (seed case with wings for wind dispersal).