St. John’s Wort Seeds – Hairy (Hypericum hirsutum)

Grow the Hairy St. John’s Wort (Hypericum hirsutum), a hardy perennial known for its bright yellow blooms and medicinal value. This plant thrives in temperate climates and adds a splash of color to gardens, meadows, and borders. It’s well-suited for pollinator gardens and low-maintenance landscapes. The Hairy variety features soft, downy foliage and star-shaped blossoms that bloom from mid-summer to early autumn.

With strong adaptability and resilience, these seeds germinate easily and establish well in both partial shade and full sun. The plant is drought-tolerant once established, making it ideal for sustainable gardening.

Features:

• Produces attractive yellow flowers with a delicate, hair-like texture on stems and leaves

• Hardy perennial plant suitable for borders, wildflower gardens, and naturalized areas

• Supports pollinators like bees and butterflies

• Easy to grow and maintain in varied soil types

• Thrives in both full sun and partial shade

Specifications:

• Scientific Name: Hypericum hirsutum

• Common Name (US): St. John’s Wort

• Plant Type: Perennial

• Height: 1.5 to 3 feet tall

• Spread: 1 to 2 feet wide

• Flower Color: Bright yellow with fine hair-like petals

• Bloom Season: Mid-summer to early autumn (June – September)

• Sun Exposure: Full sun to partial shade

• Soil Type: Well-drained, loamy or sandy soil

• Water Requirements: Moderate; drought-tolerant once established

• USDA Hardiness Zones: 4 – 8

• Sowing Time:

  • Indoors: Start 6–8 weeks before the last frost (February – March)

  • Outdoors: After the last frost when soil is warm (April – May)

• Germination Time: 14 – 21 days

• Mature Planting Distance: 12 – 18 inches apart