Lesser Canadian St. Johnswort

Hypericum canadense

Lesser Canadian St. Johnswort

Robert H. Mohlenbrock. USDA NRCS. 1995. Northeast wetland flora: Field office guide to plant species. Northeast National Technical Center, Chester. Provided by USDA NRCS Wetland Science Institute (WSI).

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Hypericaceae
Genus:
Hypericum
Species:
Hypericum canadense

Growth Characteristics

Life Cycle:
Annual
Growth Habit:
Forb/herb
Height:
2-3 ft
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
jul, aug, sep
Bloom Colors:
Orange, Yellow

Native Range

United States: Alabama, Connecticut, District of Columbia, Delaware, Florida, Georgia, Iowa, Illinois, Indiana, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, Mississippi, North Carolina, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, Vermont, Washington, Wisconsin, West Virginia, Canada: New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec

Keystone Species Ranking

Caterpillar Keystone:
★★★☆☆ Based on number of butterfly and moth species using this genus as host plant (Source: National Wildlife Federation)

Host Plant for Caterpillars

gray half-spot (Nedra ramosula)

Soil Requirements

Soil Type:
sandy, acidic, nutrient-poor soil
pH:
4.5 - 6.5 (acidic to slightly acidic)
Drainage:
excellent drainage required
Moisture:
consistently moist
Notes:
Commonly found in bogs and wet sandy areas.

Germination Information

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).

Source: OpenAI GPT-4o