Hypericum Calycinum

Saint John's Wort, Aaron's Beard

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Plant Code: HYCA

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A popular groundcover, with large golden-yellow flowers with bushy stamens tipped with red, blooms all summer. Hypericum Calycium have upright stems of bright green leaves, forming a dense weed-proof patch.

Allan Armitage calls this "one of the finest ground covers available." Will compete well with shallow tree roots and perfect for stabilizing embankments. Great for dry shade, but flowering may be reduced.


Type: Perennials, Groundcovers
Height: Short 12"
Spacing: Plant 14" apart
Bloom Time: Early Summer to Late Summer
Sun-Shade: Full Sun to Half Sun / Half Shade
Zones: 5-9   Find Your Zone
Soil Condition: Normal
Flower: Yellow
Accent: Yellow
Pot Size: 3.5" square x 4" deep

Features to Note

  • For a Slope or Bank
  • Beneficial for Pollinators
  • Deer Resistant
  • Hot Dry Site Tolerant
  • Dry Shade Tolerant
  • Groundcovers
  • Seaside/Salt Tolerant

Hypericum General Information

Hypericums spread fairly fast by underground stems. Good for bank stabilization. Excels even in poor soil forming a thick lush carpet. Evergreen in warmer climates.

Hypericum Plant Care

Mow or shear plants in late winter or early spring to help new growth. Benefits from partial shade and moister conditions in southern gardens. Will benefit from division every 2-3 years in spring or fall.