(Hypericum perforatum 'St. John's Wort')
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St. John's Wort is an introduced, short-lived, perennial, woody shrub that is native from Macaronesia to SE China, but can be found growing in open woods, hedge banks, grasslands, and roadsides throughout the United States. At maturity, this plant reaches a height of 2' and features a spreading mound of multi-smooth, green, round stems and 1” long, 1/3” wide, hairless, green oblong leaves, and 3/4”, 5 petal, goldish/yellow flowers that have black dots scattered across the edges. This plant can be grown in a container, attracts bees, is a host plant for Gray Hairstreak butterflies, is resistant to deer and rabbits, makes dye, and is both edible and medicinal!
- Non-GMO
- Evergreen Shrub
- Open Pollinated
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General Information
Family: Hypericaceae
Genus: Hypericum
Species: perforatum
Variety: St. John's Wort
Also Known As: Common St. John's-wort, Goatweed, Klamath Weed, and St. Johns Wort.
Grown as: Perennial
Maturity (Blooms): Summer - June through September
Light: Full sun in the North, shaded area in the South.
Water: Medium when young, drought tolerant when mature.
Soil Moisture: Medium moisture.
Attracts Beneficial Insects?: Yes. Attracts bees, is a host plant for Gray Hairstreak butterflies, and is resistant to deer and rabbits. However, it can be a problem for cats, dogs, and livestock.
Containers?: Yes. Due to the medium growth rate nature of this plant, it is easiest to contain by growing in a pot or indoors. An 8 to 10-inch pot is suitable for a single plant.
Maintenance: Low
Height: 2'
Spacing: 18-24”
Sow Depth: On the soil surface
USDA Zone: 3-8
Produces: a spreading mound of multi-smooth, green, round stems and 1” long, 1/3” wide, hairless, green oblong leaves, and 3/4”, 5 petal, goldish/yellow flowers that have black dots scattered across the edges.
Garden Uses: Slope/Bank, Woodlands, Pollinator Garden, Barrier, Mass Plantings.
Known hazards of Hypericum perforatum: Skin contact with the sap, or ingestion of the plant, can cause photosensitivity in some people.
Poison Severity: Medium
Causes Contact Dermatitis: Yes
Poison Part: Young Leaves, Sap/Juice.
Genus: Hypericum
Species: perforatum
Variety: St. John's Wort
Also Known As: Common St. John's-wort, Goatweed, Klamath Weed, and St. Johns Wort.
Grown as: Perennial
Maturity (Blooms): Summer - June through September
Light: Full sun in the North, shaded area in the South.
Water: Medium when young, drought tolerant when mature.
Soil Moisture: Medium moisture.
Attracts Beneficial Insects?: Yes. Attracts bees, is a host plant for Gray Hairstreak butterflies, and is resistant to deer and rabbits. However, it can be a problem for cats, dogs, and livestock.
Containers?: Yes. Due to the medium growth rate nature of this plant, it is easiest to contain by growing in a pot or indoors. An 8 to 10-inch pot is suitable for a single plant.
Maintenance: Low
Height: 2'
Spacing: 18-24”
Sow Depth: On the soil surface
USDA Zone: 3-8
Produces: a spreading mound of multi-smooth, green, round stems and 1” long, 1/3” wide, hairless, green oblong leaves, and 3/4”, 5 petal, goldish/yellow flowers that have black dots scattered across the edges.
Garden Uses: Slope/Bank, Woodlands, Pollinator Garden, Barrier, Mass Plantings.
Known hazards of Hypericum perforatum: Skin contact with the sap, or ingestion of the plant, can cause photosensitivity in some people.
Poison Severity: Medium
Causes Contact Dermatitis: Yes
Poison Part: Young Leaves, Sap/Juice.