How much sun does Great St. John's wort need?

Great St. John's wort grows best in full sun conditions.

When does Great St. John's wort bloom?

Great St. John's wort blooms in July and August.

Where is Great St. John's wort native?

Great St. John's wort (Hypericum pyramidatum) is native to CT, IA, IL, IN and 13 more states, per the World Checklist of Vascular Plants (Kew).

What pollinators does Great St. John's wort attract?

Great St. John's wort draws bumble bees and bees.

Great St. John's wort

Name: Pollinator Patch
Author: Pollinator Patch

Hypericum pyramidatum

Last reviewed: September 2026

Great St. John's wort (Hypericum pyramidatum) is a perennial forb native to CT, IA, IL, IN and 13 more states. It blooms in July and August. The flowers draw bumble bees and bees.

Toxicity unknown

Great St. John's wort (Hypericum pyramidatum) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

full sun

Water

medium

Size

24"–60" H × 18"–30" W

Bloom

Jul, Aug

Native to

CT, IA, IL, IN and 13 more states

Pollinators

bumble bees, bees

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 458 programs across 44 states, each with a link to the provider and the date we last checked it.

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Browse plants for this ecoregion

Western Corn Belt Plains Northern Lakes and Forests North Central Hardwood Forests Driftless Area Southeastern Wisconsin Till Plains Northeastern Highlands Northeastern Coastal Zone Northern Allegheny Plateau Erie Drift Plain Northern Forests Northern Piedmont Ridge and Valley Western Allegheny Plateau

Tall upright perennial with paired lance-shaped leaves and large golden-yellow flowers with prominent tufts of stamens, blooming in mid to late summer in moist meadows and streambanks.

Growing Great St. John's wort

Grow Great St. John's wort in full sun and medium water. Mature plants reach 24 to 60 inches tall and spread 18 to 30 inches wide.

Wildlife value

Flowers rely on buzz pollination and are especially attractive to bumble bees, which vibrate to release the pollen.

Common questions

How much sun does Great St. John's wort need?: Great St. John's wort grows best in full sun conditions.
When does Great St. John's wort bloom?: Great St. John's wort blooms in July and August.
Where is Great St. John's wort native?: Great St. John's wort (Hypericum pyramidatum) is native to CT, IA, IL, IN and 13 more states, per the World Checklist of Vascular Plants (Kew).
What pollinators does Great St. John's wort attract?: Great St. John's wort draws bumble bees and bees.

Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

See all plant problem guides

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