Grey Alder, Speckled Alder

Alnus incana, also known as the Grey Alder, is a tough member of the Alder family that was introduced from Europe in the 1780s. The Grey Alder is broadly pyramidal at maturity, with fairly small oval leaves that are pointed, which readily distinguishes Alnus incana from that of glutinosa. 

Catkins are produced at the end of winter, just before spring begins; they are profuse and appear in shades of pink and yellow. The bark is smooth and grey. Alnus in general is a very tough Genus of tree, and the Grey Alder is no exception to this. This tough contender is capable of tolerating and thriving in cold, wet soils and extremely exposed situations.

It is a stalwart and reliable tree that thrives on all soils, especially on calcareous sites. Interestingly, like other Alder, Alnus incana are capable of fixing nitrogen in the soil, which improves the nutrient content for the future. 

With this in mind, this tree is the perfect choice for challenging sites where conditions are less than favourable, yet trees are still on the agenda.

Mature height: 12-17m

Barcham also offers another cultivated form of the Grey Alder (Alnus incana), called Aurea.

Common names

Grey Alder, Speckled Alder

Height of tree

12-17m

Soil type

Clay, Wet, Will tolerate most soil types

Shape

Pyramidal

Foliage Colour

Green

Good for waterlogged soil

Yes

Looks good in

Winter

Location

Wetland

Genus

Alnus