How much sun does Marsh-pepper Smartweed need?

Marsh-pepper Smartweed grows best in part shade conditions.

When does Marsh-pepper Smartweed bloom?

Marsh-pepper Smartweed blooms in July, August, and September.

Where is Marsh-pepper Smartweed native?

Marsh-pepper Smartweed (Persicaria hydropiper) is native to NJ, per the USDA PLANTS Database and regional native plant society lists.

What pollinators does Marsh-pepper Smartweed attract?

Marsh-pepper Smartweed draws bees and flies.

Is Marsh-pepper Smartweed HOA-friendly?

Marsh-pepper Smartweed takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Marsh-pepper Smartweed

Name: Pollinator Patch
Author: Pollinator Patch

Persicaria hydropiper

Last reviewed: June 2026

Light

part shade

Water

high

Size

12"–24" H × 6"–12" W

Bloom

Jul, Aug, Sep

Native to

Pollinators

bees, flies

Browse plants for this ecoregion

Coast Range Sierra Nevada Central California Valley Central California Foothills and Coastal Mountains Central Basin and Range

Marsh-pepper smartweed is a compact annual herb that thrives in moist, shaded areas. It produces small spikes of tiny flowers from summer through early fall and has a neat, upright growth habit. This native plant is well-suited for rain gardens and other wet areas in the landscape.

In an HOA neighborhood

Marsh-pepper Smartweed takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Name includes 'weed' which creates negative perception
Annual lifecycle means gaps in coverage
Requires consistently moist conditions that may appear unkempt

Wildlife value

The summer blooms attract bees and flies for pollination. Seeds provide food for waterfowl and other birds in late fall.

Common questions

How much sun does Marsh-pepper Smartweed need?: Marsh-pepper Smartweed grows best in part shade conditions.
When does Marsh-pepper Smartweed bloom?: Marsh-pepper Smartweed blooms in July, August, and September.
Where is Marsh-pepper Smartweed native?: Marsh-pepper Smartweed (Persicaria hydropiper) is native to NJ, per the USDA PLANTS Database and regional native plant society lists.
What pollinators does Marsh-pepper Smartweed attract?: Marsh-pepper Smartweed draws bees and flies.
Is Marsh-pepper Smartweed HOA-friendly?: Marsh-pepper Smartweed takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

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 Marsh-pepper Smartweed? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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