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Gray Alder (Alnus incana)

  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Carl Axel Magnus Lindman (1856-1928) | ęBilder ur Nordens F... | License: PD Old PD-Art (PD-old)
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Sten Porse | Own work | License: CC-BY-SA-2.5,2.0,1.0 CC-BY-SA-3.0-migrated GFDL
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Sten at da.wikipedia | Transferred from da.wikipedia | License: CC-BY-SA-3.0,2.5,2.0,1.0 GFDL
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Beentree | Own work | License: CC-BY-SA-2.5,2.0,1.0 CC-BY-SA-3.0-migrated GFDL
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Beentree | Own work | License: CC-BY-SA-2.5,2.0,1.0 CC-BY-SA-3.0-migrated GFDL
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Beentree | Own work | License: PD-user
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Nikanos | Own work | License: CC-BY-SA-2.5
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Nikanos | Own work | License: CC-BY-SA-2.5
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Nikanos | Own work | License: CC-BY-SA-2.5
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Vassil | Own work | License: PD
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Vassil | Own work | License: PD
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Vassil | Own work | License: PD
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 1: 613. Courtesy of Kentucky Native Plant Society. | http://plants.usda.g... | License: PD USDA
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team, Fort Worth, TX. | http://plants.usda.g... | License: PD USDA
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Kenneth Dritz. USDA NRCS. 1995. Northeast wetland flora: Field office guide to plant species. Northeast National Technical Center, Chester, PA. Courtesy of USDA NRCS Wetland Science Institute. | http://plants.usda.g... | License: PD USDA
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 1: 613. Courtesy of Kentucky Native Plant Society. | http://plants.usda.g... | License: PD USDA
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 1: 613. | http://plants.usda.g... | License: PD US Government
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Kenneth Dritz. USDA NRCS. 1995. Northeast wetland flora: Field office guide to plant species. Northeast National Technical Center, Chester, PA. Courtesy of USDA NRCS Wetland Science Institute. | http://plants.usda.g... | License: PD USDA
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Quadell | inmygarden | License: CC-BY-SA-3.0-migrated GFDL
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Steve Hurst @ USDA-NRCS PLANTS Database | http://plants.usda.g... | License: PD USDA
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Steve Hurst @ USDA-NRCS PLANTS Database | http://plants.usda.g... | License: PD USDA
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: BLM | BLM Cat. no. BL032428OR.jpg | License: PD US BLM
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Robert H. Mohlenbrock. USDA NRCS. 1992. Western wetland flora: Field office guide to plant species. West Region, Sacramento, CA. Courtesy of USDA NRCS Wetland Science Institute. | http://plants.usda.g... | License: PD USDA
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: Eric Steinert | photo taken by Eric Steinert at River Lech, Germany | License: CC-BY-SA-2.5,2.0,1.0 CC-BY-SA-3.0-migrated GFDL
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: User Ettrig on sv.wikipedia | Source Missing | License: PD Nordens Flora
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: User Ettrig on sv.wikipedia | Source Missing | License: CC-BY-2.5 CC-BY-SA-3.0-migrated GFDL
  • Gray Alder (Alnus Incana) https://www.sagebud.com/gray-alder-alnus-incana
    Credit: User Ettrig on sv.wikipedia | Source Missing | License: PD-user
ALIN2.jpg

Alnus Incana, or more commonly know as Gray Alder, is a tree shrub with green foliage of the genus Alnus. It has a rapid growth rate and a height of 25 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during spring and is somewhat tolerant of shade. Alnus Incana or Gray Alder's floral region is North America US Lower 48 and Alaska, specifically in the states of Alaska, Arizona, California, Colorado, Connecticut, Iowa, Idaho, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, North Dakota, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oregon, Pennsylvania, Rhode Island, Utah, Virginia, Vermont, Washington, Wisconsin and Wyoming.

  • Category: Dicot
  • Genus: Alnus
  • Family: Betulaceae
  • Order: Fagales
  • Class: Magnoliopsida
  • Division: Magnoliophyta
  • Duration: Perennial
  • Growth Habit: Tree Shrub
  • Native Status: L48 (N) AK (N) CAN (N) SPM (N)
  • National Wetland Indicator Status: FACU FACW
  • Regional Wetland Indicator Status: 1(NI) 2(NI) 3(FACU) 4(FACW) 7(NI) 8(FACW) 9(FACW) 0(NI) A(FAC)
  • Active Growth Period: Spring and Summer
  • Allelopath: No
  • C:N Ratio: High
  • Coppice Potential: No
  • Fall Conspicuous: No
  • Fire Resistance: No
  • Flower Conspicuous: No
  • Foliage Color: Green
  • Foliage Porosity Summer: Moderate
  • Foliage Porosity Winter: Porous
  • Foliage Texture: Coarse
  • Fruit/Seed Color: Brown
  • Fruit/Seed Conspicuous: No
  • Growth Form: Thicket Forming
  • Growth Rate: Rapid
  • Height at 20 Years Maximum (feet): 15
  • Height Mature (feet): 25
  • Leaf Retention: No
  • Lifespan: Short
  • Low Growing Grass: No
  • Nitrogen Fixation: Medium
  • Resprout Ability: No
  • Shape and Orientation: Erect
  • Toxicity: None
  • Adapted to Coarse Textured Soils: Yes
  • Adapted to Fine Textured Soils: Yes
  • Adapted to Medium Textured Soils: Yes
  • Anaerobic Tolerance: High
  • CaCO3 Tolerance: Low
  • Cold Stratification Required: Yes
  • Drought Tolerance: Low
  • Fertility Requirement: Medium
  • Fire Tolerance: High
  • Frost Free Days Minimum: 100
  • Hedge Tolerance: None
  • Moisture Use: High
  • pH (Minimum): 5
  • pH (Maximum): 7
  • Planting Density per Acre Minimum: 300
  • Planting Density per Acre Maximum: 1200
  • Precipitation (Minimum): 32
  • Precipitation (Maximum): 60
  • Root Depth Minimum (inches): 24
  • Salinity Tolerance: None
  • Shade Tolerance: Intermediate
  • Temperature Minimum (°F): -33
  • Bloom Period: Spring
  • Commercial Availability: Routinely Available
  • Fruit/Seed Abundance: Low
  • Fruit/Seed Period Begin: Spring
  • Fruit/Seed Period End: Summer
  • Fruit/Seed Persistence: No
  • Propagated by Bare Root: Yes
  • Propagated by Bulbs: No
  • Propagated by Container: Yes
  • Propagated by Corms: No
  • Propagated by Cuttings: No
  • Propagated by Seed: Yes
  • Propagated by Sod: No
  • Propagated by Sprigs: No
  • Propagated by Tubers: No
  • Seed per Pound: 1084250
  • Seed Spread Rate: Slow
  • Seedling Vigor: Low
  • Small Grain: No
  • Vegetative Spread Rate: Slow





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