How much sun does Scouler's St. Johnswort need?

Scouler's St. Johnswort grows best in full sun conditions.

When does Scouler's St. Johnswort bloom?

Scouler's St. Johnswort blooms in June, July, and August.

Where is Scouler's St. Johnswort native?

Scouler's St. Johnswort (Hypericum scouleri) is native to AZ, CA, CO, ID and 7 more states, per vouchered herbarium specimen records and regional native plant society lists.

What pollinators does Scouler's St. Johnswort attract?

Scouler's St. Johnswort draws bees and beetles.

Is Scouler's St. Johnswort HOA-friendly?

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

Scouler's St. Johnswort

Name: Pollinator Patch
Author: Pollinator Patch

Hypericum scouleri

Last reviewed: August 2026

Toxicity unknown

Scouler's St. Johnswort (Hypericum scouleri) 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

low

Size

8"–24" H × 8"–16" W

Bloom

Jun, Jul, Aug

Native to

AZ, CA, CO, ID and 7 more states

Pollinators

bees, beetles

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 452 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Browse plants for this ecoregion

Coast Range Puget Lowland Marine West Coast Forest Northwestern Forested Mountains Sierra Nevada Central California Foothills and Coastal Mountains Central California Valley Southern California Mountains North American Deserts Central Basin and Range Southern Rockies Arizona/New Mexico Mountains Southwestern Tablelands Madrean Archipelago Southern California/Northern Baja Coast

Scouler's St. Johnswort is a compact native perennial that produces bright yellow flowers from June through August. This low-growing plant forms neat clumps and requires minimal water once established, making it an excellent choice for drought-tolerant gardens.

In an HOA neighborhood

Scouler's St. Johnswort is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.

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

May appear sparse in winter when dormant

Wildlife value

The cheerful yellow blooms attract native bees and beneficial beetles during the summer months. This plant provides valuable nectar sources when many other native flowers have finished blooming.

Common questions

How much sun does Scouler's St. Johnswort need?: Scouler's St. Johnswort grows best in full sun conditions.
When does Scouler's St. Johnswort bloom?: Scouler's St. Johnswort blooms in June, July, and August.
Where is Scouler's St. Johnswort native?: Scouler's St. Johnswort (Hypericum scouleri) is native to AZ, CA, CO, ID and 7 more states, per vouchered herbarium specimen records and regional native plant society lists.
What pollinators does Scouler's St. Johnswort attract?: Scouler's St. Johnswort draws bees and beetles.
Is Scouler's St. Johnswort HOA-friendly?: Scouler's St. Johnswort is generally an HOA-friendly choice in the right placement, with low maintenance.

Native range data from vouchered herbarium specimen records and regional native plant society lists. 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.

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

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