Alnus incana

Bloom Color: Purple, Red.
Main Bloom Time: Early spring, Late spring, Mid spring. Form: Pyramidal.

Alnus incana is a deciduous Tree growing to 18 m by 5 m at a fast rate.
It is hardy to zone 2. It is in flower from February to March. The species is monoecious and is pollinated by Wind.
It can fix Nitrogen.
Suitable for: medium and heavy soils and can grow in heavy clay and nutritionally poor soils. Suitable pH: acid, neutral and basic soils. It can grow in semi-shade or no shade. It prefers dry moist or wet soil. The plant can tolerate maritime exposure.

Landscape Uses:Pollard, Specimen. Prefers a heavy soil and a damp situation. Grows well in heavy clay soils. Thrives in drier soils than many other members of this genus. Tolerates very infertile sites. This species has a symbiotic relationship with certain soil micro-organisms, these form nodules on the roots of the plants and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby. Special Features:Attractive foliage, Not North American native, Wetlands plant, Inconspicuous flowers or blooms. The plant is heat tolerant in zones 6 through 1. .
At this temperature, many plants begin to suffer physiological damage. Heat Zones range from 1 to 12 .
For example Heat Zone. 11-1 indicates that the plant is heat tolerant in zones 11 through 1.) For polyculture design as well as the above-ground architecture information on the habit and root pattern is also useful and given here if available. The plant growth habit is a standard with a non-suckering single trunk .