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Hypericum calycinum
Hypericum calycinum
Garden Diary

Date purchased or acquired:

Where acquired:

Location in the garden:


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Hypericum calycinum

St. John’s-wort

USDA Zone: 5-9

Plant number: 7.355.050

Also called Rose-of-Sharon. A popular groundcover, with large golden-yellow flowers appearing throughout the summer and fall. Plants have upright stems of bright green leaves, forming a dense weed-proof patch. To encourage a bushy habit, pinch the growth tips in the spring for the first two to three seasons. Especially useful for stabilizing slopes. Excellent among shrubs and trees. Evergreen in mild winter areas. Drought tolerant once established. Space at 5 to 10 plants per square yard.

Further details for
Hypericum calycinum

Optimal Growing
Appearance and
Sun Exposure
  Full Sun or
  Partial Shade or
  Full Shade
Soil Type
  Normal or
  Sandy or
Soil pH
  Neutral or
  Alkaline or
Soil Moisture
  Average or
  Dry or
Care Level
Flower Colour
Blooming Time
  Early Summer
  Mid Summer
  Late Summer
  Late Spring
  Early Fall
  Mid Fall
Foliage Color
  Deep Green
Plant Uses & Characteristics
  Accent: Good Texture/Form
  Deer Resistant
  Drought Tolerant
  Rabbit Resistant
  Ground Cover
   30-45 cm
   12-18 inches
   30-60 cm
   12-23 inches
Foot Traffic
Growth Rate
Disclaimer: This information is presented for reference only. This plant is not currently part of our Heritage Perennials lineup.