Alphabetical Plant Listing

Hypericum perforatum (Perforate St. John's Wort)

Perforate St. John's Wort, Cammock, Common St John's Wort, Devil Chaser, Devil's Flight, Devil's Scourge, God's Wonder Plant, Herb John, Human Blood, Klamath Weed, Penny John, Rosin Rose, St Columba's Flower


Hypericum perforatum (Perforate St. John's Wort) is an upright perennial with showy, star-shaped, yellow flowers, 1 in. wide (2.5 cm), from early to late summer. Borne in pyramidal clusters, they are produced in great numbers, up to 25–100 per stem. Each flower presents 5 petals, peppered with black dots around the edge and a prominent tuft of yellow tipped stamens. The stalk-less, oblong or linear, pale green leaves display scattered translucent dots that make the leaf look perforated when held up to the light - hence the common name. Hypericum plants have been used for centuries as herbal treatments for a variety of medical problems including externally for wounds, inflammations, burns, skin disorders, and nerve pain and internally for anxiety, depression and insomnia. The active ingredient in the leaves and flowers is hypercin.

  • Grows up to 1-3 ft. tall (30-90 cm) and 2 ft. wide (60 cm). Develops extensive root systems, and spreads by both runners and often prolific self-seeding.
  • A full sun to part shade lover, this plant is easily grown in medium moisture, well-drained soils. Drought tolerant once established.
  • Low maintenance, this plant is also generally pest and disease free. Deer resistant.
  • Perfect for banks and slopes, prairies and meadows.
  • No pruning required. Propagate by seed, division or take softwood cuttings
  • Due to its ability to produce large amounts of persistent seed, Hypericum perforatum is listed as noxious weeds in California, Colorado, Montana, Nevada, Oregon, South Dakota, Washington, Wisconsin and Wyoming.
  • Ingestion may cause severe discomfort
  • Native to Europe, north Africa, southwestern Asia

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Requirements

Hardiness 3 – 8
Plant Type Perennials
Plant Family Hypericum - St John's Wort
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early,Mid,Late)
Height 1' – 3' (30cm – 90cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 24" (60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy, Fruit & Berries
Native Plants United Kingdom
Tolerance Deer, Drought
Garden Uses Banks and Slopes
Garden Styles Prairie and Meadow

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 Eskemar, Manfred Ruckszio / Shutterstock

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 3 – 8
Plant Type Perennials
Plant Family Hypericum - St John's Wort
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early,Mid,Late)
Height 1' – 3' (30cm – 90cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 24" (60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy, Fruit & Berries
Native Plants United Kingdom
Tolerance Deer, Drought
Garden Uses Banks and Slopes
Garden Styles Prairie and Meadow

Great Plant Combination Ideas with Hypericum - St John's Wort

Guides with Hypericum - St John's Wort

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