Italian Alder is a fast-growing deciduous tree native to Corsica and southern Italy, prized for its pyramidal form and glossy green foliage. In cultivation, it typically reaches 30 to 50 feet tall and 20 to 30 feet wide, thriving in hardiness zones 5 through 7. The tree produces showy catkins in spring, with elongated yellow-green male flowers and small reddish-green female flowers appearing on the same tree. It adapts well to both wet and dry soils and tolerates full sun to partial shade, making it a valuable choice for cool-climate landscapes and naturalized settings.
Partial Sun
Moderate
5-7
600in H x 360in W
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Moderate
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The glossy green leaves and pyramidal growth habit give Italian Alder a refined elegance, while its ability to thrive in both wet and dry, infertile soils makes it surprisingly adaptable for a tree of its stature. It grows quickly and handles cooler climates where other trees struggle, and the showy spring catkins add seasonal interest without requiring heavy maintenance. Root suckering can form natural thickets, which is either a feature for wildlife habitat or a management consideration depending on your garden goals.
Italian Alder is primarily used as an ornamental shade tree and for naturalized plantings, particularly in cool climates and riparian restoration projects. Its tolerance for wet soils makes it valuable for rain gardens and areas prone to seasonal flooding. The tree is also used in windbreaks and as a pioneer species in land reclamation work, thanks to its vigor and ability to thrive in poor soils.
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Prune Italian Alder in winter to early spring to shape the pyramidal form and remove dead or damaged branches. The tree naturally develops a strong central leader, so minimal pruning is typically needed. Be aware that the tree suckers from the roots and can form thickets over time; remove unwanted suckers at the base during the dormant season if you prefer a single-trunk specimen.
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“Italian Alder hails from the Mediterranean, where it is native to Corsica and southern Italy. The tree has been cultivated for its ornamental qualities and ecological value, gradually entering cultivation in cooler regions of North America and Europe. Its adaptation to marginal soils and cool climates has made it increasingly valued as a landscape tree, particularly in zones where traditional shade trees struggle.”