Norway Maple

What does Norway Maple look like?

The Norway maple is a deciduous tree reaching twenty to thirty metres in height with a broad, rounded canopy. Its grey-brown bark develops shallow grooves without turning shaggy. In early spring, before the foliage unfolds, the tree produces loose clusters of fifteen to thirty small flowers. Each blossom has five sepals and five petals coloured yellow or lime green, remaining on the branches for two to three weeks. Leaves are divided into five pointed lobes with slender teeth along the edges. Breaking a leaf stalk reveals a distinct milky white sap. In autumn, the foliage turns yellow or warm orange-red. The fruit forms paired winged keys that spread wide apart at nearly a straight angle.

Where does Norway Maple come from?

Wild populations occur naturally across central and eastern Europe and western Asia, spanning from Spain and southern Scandinavia across Russia to northern Iran and China. In these native forests, the species usually grows as a scattered understory tree rather than dominating the canopy. It can survive up to two and a half centuries in ideal native habitats. Plant collectors brought the species to northeastern North America during the middle of the eighteenth century to serve as an ornamental shade provider. Most North American plantings trace back to German seed stock suited to northern European daylight lengths.

When and how Norway Maple blooms

Seeds require roughly three months of chilling below four degrees Celsius before they sprout in early spring. Young trees start flowering at ten years of age and yield heavy seed crops by age twenty. Individual trees can change their sexual expression from year to year. The tree thrives in full sun or deep forest shade, putting out leaves early when daylight reaches thirteen hours and air warms to twelve degrees Celsius. It tolerates compacted ground and city pollution exceptionally well. Its shallow root system spreads vigorously near the surface.

How Norway Maple is used

City planners frequently plant the Norway maple along streets and in public parks to cast dense shade. In Europe, woodworkers use its pale, fine-textured timber for turned objects, flooring, and furniture, as well as stringed instruments like violins. Gardeners also train it into medium and large bonsai specimens across a wide range of styles. Because its sap contains less sugar than that of sugar maple, it is not commonly tapped for syrup.

Kinds of Norway Maple

Horticulturists have bred several popular cultivars. 'Crimson King' and 'Schwedleri' are prized for rich purple foliage that shifts toward orange in autumn. 'Drummondii' bears variegated leaves, while 'Emerald Queen' features bright green growth. Cut-leaf forms such as 'Dissectum' and 'Lorbergii' carry deeply divided, feathery blades. For tight spaces, 'Columnare' provides a narrow, upright habit. Both 'Crimson King' and 'Prigold' have earned the Award of Garden Merit from the Royal Horticultural Society.

What Norway Maple means

Following the loss of American elms to disease in the mid-twentieth century, cities planted Norway maples in vast numbers. However, its heavy seeding, deep canopy shade, and surface roots allow it to overrun wild forests and suppress native seedlings. Several United States jurisdictions, including New Hampshire, Massachusetts, and New Jersey, have banned commercial sales, while New York classifies it as an invasive threat.

Questions people ask about Norway Maple

Good reading and sources

• Encyclopaedia BritannicaArticle
• Acer platanoides 'Crimson King'Royal Horticultural Society, Article
• IUCN Red List of Threatened SpeciesIUCN Red List, Article
• Plants of the World OnlineRoyal Botanic Gardens, Kew, Plant database
• Where it has been recordedGBIF, Plant database
• Sightings and photos by naturalistsiNaturalist, Plant database

• Acer platanoides on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos
• Wikidata recordOpen data