perennialN. America Native

Oregon Checkerbloom

The Story

Plant Bio

Sidalcea oregana is an upright herbaceous perennial native to western North America, growing from a thick woody taproot into erect, coarse-haired stems. In late spring and summer, loose spike-like racemes display five-petaled pink to deep rose mallow flowers surrounding a central staminal column.

The species exhibits sexual dimorphism, naturally producing both bisexual plants and all-female plants that bear smaller flowers without anthers. Deeply lobed lower leaves give way to sharply toothed upper stem leaves, giving the tall flowering stalks an open texture.

Uses & Benefits:

Produces tall, delicate spires of rose-pink mallow flowers suitable for naturalistic borders.

Tolerates damp, seasonally saturated soils ideal for wetland edges and rain gardens.

Provides high pollen and nectar value for native bees, beneficial insects, and hummingbirds.

Essentials

At a Glance

Plant Type

Perennial

Height

48"

Width

24"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Medium to High

Humidity

Moderate

Lifespan

Perennial

Native To

Western North America

Toxicity

Non-toxic

Bloom period

Late spring – Summer

In flower about 4 months of the year

Planting

How to Grow

Select a site in full sun to partial shade with moist, well-drained loamy or sandy soil.
Plant nursery stock or plugs in spring at the same depth as their original containers.
Provide consistent moisture throughout the growing season to prevent drought-induced summer dormancy.
Cut spent stems back to the basal foliage crown after flowering completes.

Pro Tip

Avoid moving established plants; disturbing the deep woody taproot usually results in severe transplant shock or plant loss.

Keep It Thriving

Care Guide

Do

Keep soil consistently moist during spring and summer growth.
Plant in light, well-draining soils with adequate organic content.
Cut spent stalks to the ground after foliage dies back in autumn.

Don't

Do not allow the root zone to dry out completely during summer.
Do not attempt to divide or relocate established taprooted plants.
Do not plant in heavy, unamended clay soils prone to waterlogging.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Mulch
Pest Check
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Rain gardensWildflower meadowsCottage garden bordersStream margins

Companion Plants

Camassia quamash Iris missouriensis Monardella odoratissima Solidago canadensis

Multiply

Propagation Methods

Good to Know

Common Questions

Oregon Checkerbloom questions

What zones can Oregon Checkerbloom grow in?

Oregon Checkerbloom is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Oregon Checkerbloom deer resistant?

Not reliably. Deer may browse Oregon Checkerbloom, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Oregon Checkerbloom bloom?

Oregon Checkerbloom typically blooms in late spring through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Oregon Checkerbloom need full sun?

Oregon Checkerbloom does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.