How much sun does Northern St. Johnswort need?

Northern St. Johnswort grows best in part sun conditions.

When does Northern St. Johnswort bloom?

Northern St. Johnswort blooms in June, July, and August.

Where is Northern St. Johnswort native?

Northern St. Johnswort (Hypericum boreale) is native to CT, DE, IA, IL and 17 more states, per the USDA PLANTS Database and regional native plant society lists.

Is Northern St. Johnswort toxic to livestock?

The USDA PLANTS Database does not flag Northern St. Johnswort as toxic to livestock.

What pollinators does Northern St. Johnswort attract?

Northern St. Johnswort draws bees, beetles, and flies.

Is Northern St. Johnswort HOA-friendly?

Northern St. Johnswort is generally an HOA-friendly choice in the right placement, with low maintenance.

Northern St. Johnswort

Name: Pollinator Patch
Author: Pollinator Patch

Hypericum boreale

Last reviewed: June 2026

The USDA PLANTS Database (opens in new tab) does not flag Northern St. Johnswort as toxic to livestock.

Light

part sun

Water

medium

Size

6"–16" H × 4"–12" W

Bloom

Jun, Jul, Aug

Native to

CT, DE, IA, IL and 17 more states

Pollinators

bees, beetles, flies

Northern St. Johnswort is a compact native wildflower that produces cheerful yellow blooms throughout the summer months. This low-growing perennial forms neat clumps with small oval leaves and stays well-behaved in the garden. It thrives in partial sun conditions with average moisture and provides reliable color from June through August.

In an HOA neighborhood

Northern St. Johnswort is an HOA-friendly choice. Maintenance level: low. Tidiness: 2 out of 5.

Works well in: front yard, foundation, street edge, mid zone.

Wildlife value

The bright yellow flowers attract various beneficial insects including native bees, beetles, and flies during its long blooming period. This native plant supports local pollinator populations while requiring minimal care once established.

Common questions

How much sun does Northern St. Johnswort need?: Northern St. Johnswort grows best in part sun conditions.
When does Northern St. Johnswort bloom?: Northern St. Johnswort blooms in June, July, and August.
Where is Northern St. Johnswort native?: Northern St. Johnswort (Hypericum boreale) is native to CT, DE, IA, IL and 17 more states, per the USDA PLANTS Database and regional native plant society lists.
Is Northern St. Johnswort toxic to livestock?: The USDA PLANTS Database does not flag Northern St. Johnswort as toxic to livestock.
What pollinators does Northern St. Johnswort attract?: Northern St. Johnswort draws bees, beetles, and flies.
Is Northern St. Johnswort HOA-friendly?: Northern St. Johnswort is generally an HOA-friendly choice in the right placement, with low maintenance.

Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

Ready to grow Northern St. Johnswort? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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