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
