Alnus nepalensis is a deciduous Tree growing to 22 m at a fast rate. It is hardy to zone 9. It is in flower from September to October. 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 moist or wet soil.
Forests in ravines, on stream banks and occasionally in drier localities, 900 - 2700 metres in the Himalayas., Woodland Garden Canopy, Bog Garden, Woodland Garden Canopy, Bog Garden
Agroforestry Services: Crop shade Agroforestry Services: Nitrogen Fodder: Bank Management: Coppice Management: Standard Regional Crop Prefers a heavy soil and a damp situation. Grows well in heavy clay soils. Succeeds in very infertile sites. The Nepalese alder is reported to tolerate clay, flooding, fog, gravel, sand, shade, slope, water-logging, and weeds. It is not tolerant of high winds. Grows best in deep well-drained loams or loamy soils of alluvial soils, but ranges from gravel to sand to clay. Prefers an annual rainfall estimated at 50 - 250cm, an annual average temperature in the range of 19 - 23°C, and a pH of 6 - 8. This species is possibly only hardy in the milder areas of Britain. 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.