Content Detail

Norway maple is an invasive plant. An invasive plant is a plant species that is non-native to the location being considered and whose presence and spread negatively impacts (or is likely to impact) ecological, economic, or human health.

This tree spreads by seed. It grows in a wide range of soils and environments and has been planted in many urban and suburban areas. Norway maple is native to Europe and Asia. It was introduced into the United States as a landscape tree and is still sold in some areas. It is found throughout much of the eastern United States, as well as the West Coast and northwestern states.

Due to excessive seeding, Norway maple is able to shade out native wildflowers in wooded areas and may even be able to outcompete native trees and shrubs. This reduces species diversity and alters habitat. Data collected at The Morton Arboretum show that this tree is invasive on the Arboretum’s grounds.

There are a number of native and non-native species that could be used in place of Norway maple. More desirable species may be found using the Search Trees and Plants page of the Arboretum website. Before purchasing or planting a tree, check for any local or state guidelines on the species. Make sure the plant is suitable for its habitat by checking its attributes at mortonarb.org or plants.usda.gov.

  • Family (English) Soapberry
  • Family (botanic) Sapindaceae
  • 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 35-50 feet
  • Light exposure Full sun (6 hrs direct light daily), Partial sun / shade (4-6 hrs light daily)
  • Hardiness zones Zone 4, Zone 5 (Northern Illinois), Zone 6 (City of Chicago), Zone 7
  • Soil preference Moist, well-drained soil
  • Tolerances Alkaline soil, clay soil, Dry sites, Occasional drought, Occasional flooding, Road salt, Wet sites
  • Season of interest mid spring, early fall, mid fall
  • Flower color and fragrance Yellow
  • Shape or form Round
  • Growth rate Fast
  • Transplants well Yes
  • Planting considerations Aggressive, Commonly planted
  • Wildlife Insect pollinators
  • Has cultivars Yes

More Information

Size and Method of Spreading

Norway maple will grow 40 to 50 feet tall and 35 to 50 feet wide.

Bark Color and Texture

The bark is gray and fairly tightly ridged and furrowed.

Leaf Description

Norway maple has simple leaves, 3 to 6 inches long, in pairs (opposite). Leaves have five pointed lobes and are slightly broader than those of sugar maple. The leaves are dark green in summer. Fall color can range from yellow-green to yellow.

Flower Description

Small, pale yellow flowers appear in upright, rounded clusters. Although inconspicuous by themselves, they are very showy when the whole tree is in flower.

Fruit Description

The fruit are winged seeds in pairs (samaras). Each wing is 1 to 2 inches long and the two wings are spread at a wide angle. They start off green and mature to brown.

General Management

Norway maple can be managed through mechanical and chemical methods. For more information on management of this plant, contact The Morton Arboretum Plant Clinic (630-719-2424 or plantclinic@mortonarb.org).

Donate

Your support is vital to the Arboretum, where the power of trees makes a positive impact on people’s lives.

Make a gift