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Douglas’ Onion (Allium Douglasii) Native Growing Regions: Idaho Oregon Washington

• Category: Monocot
• Genus: Allium
• Family: Liliaceae
• Order: Liliales
• Class: Liliopsida
• Division: Magnoliophyta
• Duration: Perennial
• Growth Habit: Forb/herb
• Native Status: L48 (N)
• National Wetland Indicator Status: FAC+
• Regional Wetland Indicator Status: 9(FAC+)
• Active Growth Period: Spring
• After Harvest Regrowth Rate: Slow
• Allelopath: No
• Bloat: None
• C:N Ratio: Medium
• Coppice Potential: No
• Fall Conspicuous: No
• Fire Resistance: No
• Flower Color: Purple
• Flower Conspicuous: Yes
• Foliage Color: Green
• Foliage Porosity Summer: Porous
• Foliage Porosity Winter: Porous
• Foliage Texture: Medium
• Fruit/Seed Color: Brown
• Fruit/Seed Conspicuous: Yes
• Growth Form: Single Crown
• Growth Rate: Rapid
• Height Mature (feet): 0.9
• Leaf Retention: No
• Lifespan: Short
• Low Growing Grass: No
• 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: Low
• CaCO3 Tolerance: Medium
• Cold Stratification Required: No
• Drought Tolerance: Medium
• Fertility Requirement: Low
• Fire Tolerance: High
• Frost Free Days Minimum: 100
• Hedge Tolerance: None
• Moisture Use: Medium
• pH (Minimum): 6
• pH (Maximum): 7.8
• Planting Density per Acre Minimum: 4800
• Planting Density per Acre Maximum: 11000
• Precipitation (Minimum): 8
• Precipitation (Maximum): 16
• Root Depth Minimum (inches): 8
• Salinity Tolerance: None
• Shade Tolerance: Intolerant
• Temperature Minimum (°F): -28
• Bloom Period: Late Spring
• Commercial Availability: No Known Source
• Fruit/Seed Abundance: Low
• Fruit/Seed Period Begin: Spring
• Fruit/Seed Period End: Summer
• Fruit/Seed Persistence: No
• Propagated by Bare Root: No
• Propagated by Bulbs: Yes
• Propagated by Container: No
• 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 Spread Rate: Slow
• Seedling Vigor: Medium
• Small Grain: No
• Vegetative Spread Rate: Slow

Douglas’ Onion (Allium Douglasii)

Allium Douglasii, or more commonly know as Douglas’ Onion, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) with green foliage and purple flowers of the genus Allium. It has a rapid growth rate and a height of 0.9 feet at maturity. It’s duration is perennial which means it will grow year after year. It’s active growth period is spring, blooms during late spring, is intolerant of shade and is routinely available commercially. Allium Douglasii or Douglas’ Onion‘s floral region is North America US Lower 48, specifically in the states of Idaho, Oregon and Washington.

Tags: Allium, Forb/herb, Green, Liliaceae, Liliales, Liliopsida, Magnoliophyta, Monocot, Perennial, Rapid, Single Crown

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Related Plants:

1. Douglas’ Sedge (Carex Douglasii)
2. Douglas’ Dustymaiden (Chaenactis Douglasii)
3. Douglas’ Bluegrass (Poa Douglasii)
4. Douglas’ Buckwheat (Eriogonum Douglasii)
5. Douglas’ Mesamint (Pogogyne Douglasii)
6. Douglas’ Spineflower (Chorizanthe Douglasii)
7. Douglas’ Stitchwort (Minuartia Douglasii)
8. Douglas’ Silverpuffs (Microseris Douglasii)
9. Douglas’ Spikemoss (Selaginella Douglasii)
10. Douglas’ Clover (Trifolium Douglasii)
11. Douglas’ Thistle (Cirsium Douglasii)
12. Douglas’ Grasswidow (Olsynium Douglasii)
13. Douglas’ Golden Violet (Viola Douglasii)
14. Douglas’ Knotweed (Polygonum Douglasii)
15. Douglas-Fir Dwarf Mistletoe (Arceuthobium Douglasii)