Science · Plants, Natives & Crops
Red Alder
Red alder is a fast-growing, shade-intolerant pioneer native to the Pacific coast of North America. Productive management favors suitable moisture conditions, adequate growing space and timely stand tending, while its nitrogen-fixing capacity can contribute to soil fertility.
Profile
- Origin
- Pacific coastal North America, from southeastern Alaska to southern California.
- Growth habit
- Deciduous pioneer with rapid juvenile growth and a relatively short lifespan.
- Light
- Strongly shade intolerant.
- Nitrogen fixation
- Forms nitrogen-fixing root nodules with Frankia.
- Rooting
- Shallow and spreading where poor drainage limits rooting; deeper on better-drained soils.
- Longevity
- Oregon State reports maturity around 60–70 years and survival seldom beyond 100 years.
Water & soil context
- Moisture (VWC)
- No numeric root-zone volumetric water content target is specified in the cited publications.
- Salinity tolerance
- No numeric irrigation-water EC or soil-salinity management threshold is specified in the cited publications.
- Drought tolerance
- Moisture availability is important, especially toward the drier southern portion of its range; it should not be treated as a drought-site timber species.
Illustrative monitoring-depth band
6–12 in
Editorial placement example, not a validated optimum or total rooting depth. Confirm the site's root distribution and soil horizons; multiple depths may be needed.
Moist habitat association does not imply that all poorly drained sites are productive. Evaluate soil depth, aeration and seasonal moisture supply together.
Problems to watch
- Avoid suppression by competing vegetation because alder is shade intolerant.
- Protect stems and roots from logging or tending injuries that can facilitate decay.
- Match stand density and thinning to timber objectives and rapid early growth.
Stress signs
- The cited publications do not provide a validated irrigation-specific stress-indicator list; crown decline requires investigation of moisture, competition, injury and disease.
Where you'll find it
- Furniture and cabinetry
- Veneer and plywood
- Pulpwood
More plants, natives & crops
Published botanical and soil references are distinct from GroundWorx product guidance. Moisture thresholds and monitoring depths require site calibration; sources do not establish product performance or diagnose stress.