Plant Finder


Seaside Alder*

Alnus maritima

Add To My Wish List

print page
Seaside Alder (Alnus maritima) at Alsip Home and Nursery

Seaside Alder

Seaside Alder

(Photo courtesy of NetPS Plant Finder)

* This is a "special order" plant - contact store for details

Height:  15 feet

Spread:  15 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  4

Other Names:  Beach Alder


A tough North American native that forms shrubby thickets in time, good for naturalizing an area, tolerant of ocean spray and wet conditions so ideal for seaside plantings

Ornamental Features

Seaside Alder features subtle tan catkins hanging below the branches in early fall. It has dark green foliage throughout the season. The glossy narrow leaves do not develop any appreciable fall color. The fruit is not ornamentally significant.

Landscape Attributes

Seaside Alder is a multi-stemmed deciduous shrub with a more or less rounded form. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition.

This shrub will require occasional maintenance and upkeep, and is best pruned in late winter once the threat of extreme cold has passed. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Spreading

Seaside Alder is recommended for the following landscape applications;

  • Mass Planting
  • Naturalizing And Woodland Gardens

Planting & Growing

Seaside Alder will grow to be about 15 feet tall at maturity, with a spread of 15 feet. It has a low canopy with a typical clearance of 2 feet from the ground, and is suitable for planting under power lines. It grows at a fast rate, and under ideal conditions can be expected to live for 40 years or more.

This shrub does best in full sun to partial shade. It is quite adaptable, prefering to grow in average to wet conditions, and will even tolerate some standing water. It is not particular as to soil type or pH, and is able to handle environmental salt. It is highly tolerant of urban pollution and will even thrive in inner city environments. This species is native to parts of North America.


* This is a "special order" plant - contact store for details

Hardiness Zone Plant Height Minimum Sunlight
Massing  Naturalizing 
Ornamental Features