Cascara serpentine buckthorn (Frangula purshiana)

Cascara serpentine buckthorn

Also known as: Cascara, Caribou coffeeberry

Cascara serpentine buckthorn is native to the Pacific Ocean and the Rocky Mountains. It’s known for its greenish flowers that appear in clusters that form a cup shape. It also has black seeded berries thare rather tasteless. The bark is aromatic and is often collected during the summer.

Scientific classification

Species

Cascara serpentine buckthorn (Frangula purshiana)

Roses, elms, figs, and allies

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Perennial

Lifespan

Tree

Plant Type

12 m

Plant Height

9 m

Spread

Deciduous

Leaf type

Images of Cascara serpentine buckthorn

Attributes of Cascara serpentine buckthorn

Growth Rate

With a slow growth rate, cascara serpentine buckthorn heightens its biological functions during the spring and summer seasons. As its growth speed intensifies during these periods, evident in an observable increase in leaf production and slow stem elongation. This slower pace ensures optimal utilization of resources, leading to hardier and more disease-resistant specimens.

Care Guide for Cascara serpentine buckthorn

Every 1-2 weeks

Water

Partial sun

Sunlight

Garden Soil

Soil Type

Water: Cascara serpentine buckthorn thrives in moderate water environments, requiring watering every 1-2 weeks. While it can endure temporary dry spells, it prefers consistently moist soil. Adjust its watering based on local climate and rainfall to maintain optimal health.

Fertilize: For cascara serpentine buckthorn, use balanced fertilizers during the growing season, switching to high-nitrogen before blooming. Fertilize biannually in spring and mid-summer, avoiding overfeeding. Adjust nutrition in winter dormancy. Water cascara serpentine buckthorn after fertilization to aid nutrient absorption and prevent root burn.

Pruning: Cascara serpentine buckthorn is a deciduous shrub or tree valued for its dark green leaves and medicinal bark. Prune in early spring to remove dead or diseased branches and improve air circulation. Clean, sharp tools are essential for minimizing damage and promoting healthier growth.

Propagation: Cascara serpentine buckthorn propagates best from 6-8 inch hardwood cuttings from healthy plants. Use rooting hormone and plant in well-draining soil. Ensure consistent moisture and avoid extreme temperatures. Once established, mulching helps retain moisture and control weeds.

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