Credit: Gauna | USDA FS Modoc NF | License: PD Old

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Cascara Buckthorn (Frangula Purshiana) Native Growing Regions: California Idaho Montana Oregon Washington

• Category: Dicot
• Genus: Frangula
• Family: Rhamnaceae
• Order: Rhamnales
• Class: Magnoliopsida
• Division: Magnoliophyta
• Duration: Perennial
• Growth Habit: Tree Shrub
• Native Status: L48 (N) CAN (N)
• Active Growth Period: Spring and Summer
• Allelopath: No
• Bloat: None
• C:N Ratio: High
• Coppice Potential: Yes
• Fall Conspicuous: Yes
• Fire Resistance: No
• Flower Color: White
• Flower Conspicuous: No
• Foliage Color: Dark Green
• Foliage Porosity Summer: Dense
• Foliage Porosity Winter: Moderate
• Foliage Texture: Coarse
• Fruit/Seed Color: Black
• Fruit/Seed Conspicuous: Yes
• Growth Form: Multiple Stem
• Growth Rate: Slow
• Height at 20 Years Maximum (feet): 20
• Height Mature (feet): 35
• Leaf Retention: No
• Lifespan: Long
• Low Growing Grass: No
• Resprout Ability: Yes
• Shape and Orientation: Semi-Erect
• Toxicity: None
• Adapted to Coarse Textured Soils: Yes
• Adapted to Fine Textured Soils: No
• Adapted to Medium Textured Soils: Yes
• Anaerobic Tolerance: None
• CaCO3 Tolerance: Low
• Cold Stratification Required: Yes
• Drought Tolerance: Medium
• Fertility Requirement: Low
• Fire Tolerance: Medium
• Frost Free Days Minimum: 150
• Hedge Tolerance: Medium
• Moisture Use: Medium
• pH (Minimum): 5.9
• pH (Maximum): 7.9
• Planting Density per Acre Minimum: 300
• Planting Density per Acre Maximum: 700
• Precipitation (Minimum): 14
• Precipitation (Maximum): 45
• Root Depth Minimum (inches): 24
• Salinity Tolerance: None
• Shade Tolerance: Tolerant
• Temperature Minimum (°F): -3
• Bloom Period: Mid Spring
• Commercial Availability: No Known Source
• Fruit/Seed Abundance: High
• Fruit/Seed Period Begin: Spring
• Fruit/Seed Period End: Summer
• Fruit/Seed Persistence: Yes
• Propagated by Bare Root: Yes
• Propagated by Bulbs: No
• Propagated by Container: Yes
• Propagated by Corms: No
• Propagated by Cuttings: Yes
• Propagated by Seed: Yes
• Propagated by Sod: No
• Propagated by Sprigs: No
• Propagated by Tubers: No
• Seed per Pound: 12300
• Seed Spread Rate: Slow
• Seedling Vigor: Medium
• Small Grain: No
• Vegetative Spread Rate: None

Cascara Buckthorn (Frangula Purshiana)

Frangula Purshiana, or more commonly know as Cascara Buckthorn, is a tree shrub with dark green foliage and white flowers of the genus Frangula. It has a slow growth rate and a height of 35 feet at maturity. It’s duration is perennial which means it will grow year after year. It’s active growth period is spring and summer, blooms during mid spring, is tolerant of shade and is routinely available commercially. Frangula Purshiana or Cascara Buckthorn‘s floral region is North America US Lower 48, specifically in the states of California, Idaho, Montana, Oregon and Washington.

Tags: Dark Green, Dicot, Frangula, Magnoliophyta, Magnoliopsida, Multiple Stem, Perennial, Rhamnaceae, Rhamnales, Slow, Tree Shrub

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