Alder

Alnus glutinosa

Layer 1 · Canopy
Nitrogen fixer

Status by region

No restrictions recorded in the lists we checked.

Checked against the European Union list (Regulation 1143/2014) · Portugal's national invasive species list (Decreto-Lei 92/2019).

Information based on the cited sources, not legal advice — always confirm your local rules.

About

Native to Europe, the alder is an indigenous tree associated with watercourses and very damp soils. It fixes atmospheric nitrogen in the soil through root nodules in symbiosis with actinobacteria. It is a pivotal pioneer species in ecosystem regeneration and bank stabilisation.

See which trees alder grows well with

These trees share this species' soil and climate — the pairing is inferred from conditions, not from a guild we have already seen.

Kiwi vine

No account needed.

Needs

Water: High
Light: Full sun
Size: Tree up to 20 m
Mature diameter: 6 m
Soils: Clay, Loam, Sandy
Climates: Atlantic coast, Inland / Continental, Mountain / cold

Calendar

January — Planting
February — Planting
March — Harvest
April — Harvest
May
June
July
August
September
October — Harvest
November — Planting
December — Planting

Harvest
Planting

Medicinal use: The tannin-rich bark is used in traditional medicine for gargles and astringent baths.

Where to buy

Central trees worth considering

May work well together — same soil and climate, complementary layers. We have not seen this combination in a generated guild yet.

Kiwi vine

May grow well with

Suggestions worked out from growing conditions — same soil and climate, complementary layers and functions. These are not observed guilds; treat them as a starting point to try on your own land.