Dense, shade-casting European maple once planted widely as a street tree. It seeds heavily into woodlands, where its shade suppresses native understory.
Listed as invasive / prohibited in CT, MA. The planner flags it (OL-INVASIVE) for sites in those jurisdictions. Details and sources.
Size over time
Typical landscape size 12–15 m (39–49 ft) tall and 10–14 m (33–46 ft) wide; medium growth, about 25 years to maturity. Intermediate sizes use the planner’s growth curve (k = 0.25) from the BB-2in install size.
Bloom
Yellow-green flowers, Apr (northern-hemisphere months; timing shifts with region and season).
Bloom calendar: months each plant is in bloom
Plant
J
F
M
A
M
J
J
A
S
O
N
D
Norway maple : Apr
Design notes
Shallow roots and deep shade make lawn and beds beneath nearly impossible.
Substitute red maple, sugar maple, black gum or a native oak.
Regions
Native range: Europe and western Asia.
Not recorded as native to any of the three pilot regions.
Native status describes where the species occurs naturally. It is not a promise that it suits a particular garden; site conditions decide that.
Regulated: invasive in CT (Connecticut Invasive Plant List); prohibited in MA (Massachusetts Prohibited Plant List).
Check your state’s current list before planting.
Other listings: regulated — US-NY (Prohibited and Regulated Invasive Species (6 NYCRR Part 575)).