How much sun does Bristly Lady's-thumb need?

Bristly Lady's-thumb grows best in part sun conditions.

When does Bristly Lady's-thumb bloom?

Bristly Lady's-thumb blooms in July, August, and September.

What pollinators does Bristly Lady's-thumb attract?

Bristly Lady's-thumb draws bees and flies.

Is Bristly Lady's-thumb HOA-friendly?

Bristly Lady's-thumb takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Bristly Lady's-thumb

Name: Pollinator Patch
Author: Pollinator Patch

Persicaria longiseta

Last reviewed: August 2026

Toxicity unknown

Bristly Lady's-thumb (Persicaria longiseta) 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

part sun

Water

medium

Size

8"–24" H × 6"–18" W

Bloom

Jul, Aug, Sep

Pollinators

bees, flies

Native alternatives to Bristly Lady's-thumb

Bristly Lady's-thumb is not native to the United States. These natives fill a similar role in a planting, matched on bloom season, bloom color and mature size.

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Bristly lady's-thumb is a low-growing annual wildflower with small pink or white flower spikes that bloom from summer into fall. This native forb thrives in partial sun with moderate water needs and naturally reseeds each year. The plant has a somewhat weedy appearance but provides valuable late-season blooms when many other flowers have finished.

In an HOA neighborhood

Bristly Lady's-thumb takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Has a distinctly weedy appearance
Annual growth means patchy coverage
Common name includes 'weed' associations

Wildlife value

The summer and fall blooms attract various bees and beneficial flies when other nectar sources may be scarce. As an annual that readily self-seeds, it can provide consistent habitat year after year.

Common questions

How much sun does Bristly Lady's-thumb need?: Bristly Lady's-thumb grows best in part sun conditions.
When does Bristly Lady's-thumb bloom?: Bristly Lady's-thumb blooms in July, August, and September.
What pollinators does Bristly Lady's-thumb attract?: Bristly Lady's-thumb draws bees and flies.
Is Bristly Lady's-thumb HOA-friendly?: Bristly Lady's-thumb takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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Common plant problems, and what to check first

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