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Northern St. John's Wort (Hypericum boreale (Britton) E.P. Bicknell)

Also known as northern st. Johnswort.

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Northern St. John's Wort
Photo © Quinten Wiegersma, CC BY 4.0.


A small, short-lived perennial of wetlands, native to the northeastern US and Canada.

Range - Expand

Native or Not Present
Introduced or Not Present

This tentative map is based on our own research. It may have limited data on Canada and/or Mexico, and there is some subjectivity in our assignment of plants as introduced vs. expanded. Read more in this blog post.

Similar Plants

thumbnail of Dwarf St. John's Wort
Dwarf St. John's Wort (Hypericum mutilum)
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Found in a variety of sunny to lightly shaded wetlands, including bogs, marshes, and margins of ponds and streams. In the south of its range it is limited to sinkhole ponds in mountains and interdune depressions along the coast. It is less common in anthropogenic habitats but grows in commercial cranberry bogs and may be spread to new regions with cranberry plants.

Life Cycle

Northern St. John's wort is a short-lived perennial. It usually lives 2-3 years.

Hypericum boreale (northern St. Johnswort) | USDA PLANTS Database (About This Site)

Hypericum boreale | Go Botany (About This Site)

Northern St. John's-Wort | iNaturalist (About This Site)

Hypericum boreale | Biota of North America Project (BONAP) (About This Site)

Hypericum boreale | NatureServe Explorer (About This Site)

Hypericum boreale | Flora of North America (About This Site)

Northern St. Johnswort | Maryland Biodiversity Project (About This Site)

Hypericum boreale (Northern St. John's-wort) | Minnesota Wildflowers (About This Site)

Hypericum boreale (Britt.) Bickn. (Northern St. John's-wort) | Digital Atlas of the Virginia Flora (About This Site)

Photo gallery

Photo © bobkennedy, CC BY-SA 4.0.
Photo © Ian Manning, CC BY 4.0.
Photo © Ian Manning, CC BY 4.0.
Photo © Quinten Wiegersma, CC BY 4.0.