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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, 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, Yellow Shrub, yellow flowers,
Hypericum perforatum, 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, Yellow Shrub, yellow flowers,

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 hypericin.

  • 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 is required. Propagate by seed, division, or take softwood cuttings.
  • Toxic to horses.
  • Due to its ability to produce large amounts of persistent seed, Hypericum perforatum is listed as a noxious weed in California, Colorado, Montana, Nevada, Oregon, South Dakota, Washington, Wisconsin, and Wyoming.
  • Find where this species is invasive in the United States.
  • Ingestion may cause severe discomfort
  • Native to Europe, North Africa, southwestern Asia

Requirements

Hardiness 3 - 8
Plant Type Perennials
Plant Family Hypericaceae
Genus Hypericum
Common names 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)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy, Fruit & Berries
Tolerance Drought, Deer
Garden Uses Banks And Slopes
Garden Styles Prairie and Meadow
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Alternative Plants to Consider

Hypericum densiflorum (Bushy St. John’s Wort)
Hypericum ascyron (Great St. John’s Wort)
Hypericum prolificum (Shrubby St. John’s Wort)
Hypericum kalmianum Cobalt-n-Gold™ (Kalm St. John’s Wort)
Hypericum x hidcoteense ‘Hidcote’ (St. John’s Wort)
Hypericum frondosum ‘Sunburst’ (St. John’s Wort)
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.
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Requirements

Hardiness 3 - 8
Plant Type Perennials
Plant Family Hypericaceae
Genus Hypericum
Common names 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)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy, Fruit & Berries
Tolerance Drought, Deer
Garden Uses Banks And Slopes
Garden Styles Prairie and Meadow
How Many Plants
Do I Need?
Not sure which Hypericum (St. John's Wort) to pick?
Compare Now

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