Bear's Breeches, or Acanthus mollis is best grown in deep, rich, well-drained soil. Plants need protection from hot afternoon sun. So provide a growing area with afternoon shade. Plant out in late winter early spring. It is hardy and evergreen to Zone 7.
Propagation: Sow seeds in spring, divide plants in spring or autumn, or take root cuttings in late autumn or early winter.
Problems: Powdery mildew, fungal and bacterial leaf spot. Provide good circulation in growing area to avoid problem.

Since it has a strong architectural accent, it is best placed at the rear of the border.

Acanthus overview:
Height-3 ft. to 6 ft., and spread 3 ft. to 6 ft. Growth Habit: Clumps
Light: Full Sun to Part Shade
Moisture: Medium Moisture
Maintenance: Low
Characteristics: Showy Flowers, & Showy Foliage
Bloom Time: Early Summer; Summer
Flower Color: White
Foliage Color: Evergreen
Uses: Beds and Borders
Style: Cottage Garden
Seasonal Interest: Fall Interest
Type of plant: Perennials

Courtesy of NYBG Plant Information Service