HYPERICUM KALMIANUM / KALM'S ST. JOHN'S WORT

HYPERICUM KALMIANUM / KALM’S ST. JOHN’S WORT

A Native Evergreen Groundcover with Bright Summer Blooms

Hypericum kalmianum, commonly known as Kalm’s St. John’s Wort, is a native evergreen perennial admired for its low-growing, spreading habit, glossy green foliage, and vibrant yellow flowers that bloom in early to mid-summer. Thriving in full sun with well-drained soils, Kalm’s St. John’s Wort adds year-round texture, seasonal color, and ecological value to rock gardens, borders, and naturalized landscapes. Its compact form makes it ideal as a low-maintenance groundcover or accent plant.

Why Choose Kalm’s St. John’s Wort?

Evergreen & Year-Round Interest: Provides consistent greenery throughout the growing season.
Pollinator Friendly: Bright yellow flowers attract bees and butterflies.
Low Maintenance: Hardy, drought-tolerant, and adaptable to various soil types.
Ornamental & Compact: Glossy foliage and vibrant blooms make it ideal for borders and rock gardens.

Key Features:

Foliage Color: Glossy green, evergreen leaves.
Flower Color: Bright yellow blooms in early to mid-summer.
Height and Spread: Typically grows 6–12 inches tall and spreads 18–24 inches wide.
Hardiness: Hardy to USDA Zones 3–7.
Sunlight: Prefers full sun.
Soil Requirements: Well-drained soils; tolerates sandy or loamy soils.

Specifications:

Plant Size: 6–12 inches tall, 18–24 inches wide.
Growth Habit: Low, spreading evergreen perennial.
Hardiness: USDA Zones 3–7.
Flowering: Early to mid-summer with bright yellow blooms.

Ideal Uses:

Rock Gardens & Borders: Adds color, texture, and low-maintenance interest.
Groundcover & Naturalized Landscapes: Forms dense mats for erosion control and garden coverage.
Pollinator Gardens: Supports bees, butterflies, and other beneficial insects.
Low-Maintenance Landscapes: Hardy, drought-tolerant, and long-lived once established.

Kalm’s St. John’s Wort is a charming and ecologically valuable native perennial. Its evergreen foliage, bright summer flowers, and low-maintenance growth habit make it an excellent choice for rock gardens, borders, groundcovers, and pollinator-friendly landscapes.