Great St. John's Wort, Hypericum Seed
Great St. John's Wort Hypericum Seed
- Early-Mid Summer, Mid-Late Summer bloom season
- Full Sun, Partial exposure
- Medium, Medium to Wet soil moisture
- 24–36 inches plant spacing
Key Attributes
About Great St. John's Wort, Hypericum Seed
Great St. John's Wort (Hypericum pyramidatum) is a distinctive North American native plant. Large yellow flowers top tall stems in midsummer, and spreading rhizomes help establish substantial colonies in moist sites. It matures at approximately 72 inches tall and flowers from early to mid summer through mid to late summer. Plant it in full sun to partial shade, in medium to medium-wet conditions, with loamy soil or clay soil. Space plants 24–36 inches apart for healthy growth and airflow.
Growing details
Plant profile
Seed & variety
Before Planting
Planting
Watering
Fertilizer
Harvesting
Tips
Pests & Diseases
Provide suitable spacing and airflow, water near the soil surface, and remove heavily affected debris if leaf spots, mildew, or stem decline appear. Avoid keeping crowns continuously saturated unless the species requires wet conditions.
Inspect seedlings and young growth for slugs, chewing insects, and sap-feeding pests. Healthy established native plants often tolerate light feeding; identify the pest before using the least disruptive labeled control.
Native States & Regions
- Connecticut
- Illinois
- Indiana
- Iowa
- Maine
- Massachusetts
- Michigan
- Minnesota
- New Hampshire
- New Jersey
- New York
- Ohio
- Pennsylvania
- Rhode Island
- Vermont
- Wisconsin
Native regions: Great Lakes
Great St. John's Wort Hypericum Native Range Map
Native range describes natural occurrence, not the origin of this seed lot or every location where a plant can be grown.
Alaska and Hawaii are shown as insets. State-level range does not mean a plant occurs throughout every part of that state.
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