When does Lythrum alatum bloom?

Lythrum alatum typically flowers from June through August, producing small purple blooms along its upright stems.

What pollinators visit Lythrum alatum?

Bees, butterflies and beetles regularly visit the flowers of Lythrum alatum for nectar and pollen.

What growing conditions suit Lythrum alatum best?

This forb grows best in full sun to part sun with medium to consistently wet soil, similar to the marshes, wet meadows and ditches where it is often found.

What kind of habitat does Lythrum alatum grow in?

It is typically found in wet prairies, marsh edges, streambanks and roadside ditches where soil stays moist for extended periods.

Is Angled Purple Loosestrife HOA-friendly?

Angled Purple Loosestrife is generally an HOA-friendly choice in the right placement, with low maintenance.

Angled Purple Loosestrife

Name: Pollinator Patch
Author: Pollinator Patch

Lythrum alatum

Last reviewed: August 2026

Lythrum alatum, or winged loosestrife, is a slender forb that blooms from June through August with small purple flowers, favoring wet prairies, marshes and ditches across much of the central and eastern United States.

Toxicity unknown

Angled Purple Loosestrife (Lythrum alatum) 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

medium

Size

12"–36" H × 6"–18" W

Bloom

Jun, Jul, Aug

Native to

AL, AR, CO, CT and 34 more states

Pollinators

bees, butterflies, 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.

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Browse plants for this ecoregion

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Angled purple loosestrife is a well-behaved native wildflower with slender spikes of small purple-pink flowers from June through August. This compact perennial forms neat clumps and works well in sunny gardens with average moisture.

Growing Angled Purple Loosestrife

Grow Angled Purple Loosestrife in full sun and medium water. Mature plants reach 12 to 36 inches tall and spread 6 to 18 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Angled Purple Loosestrife is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.

Works well in: mid zone, foundation.

Name association with invasive purple loosestrife may cause confusion
Can look sparse in winter as herbaceous perennial

Wildlife value

The flowers attract native bees, butterflies, and beneficial beetles throughout the summer blooming period. This native plant provides nectar resources during peak growing season.

Common questions

When does Lythrum alatum bloom?: Lythrum alatum typically flowers from June through August, producing small purple blooms along its upright stems.
What pollinators visit Lythrum alatum?: Bees, butterflies and beetles regularly visit the flowers of Lythrum alatum for nectar and pollen.
What growing conditions suit Lythrum alatum best?: This forb grows best in full sun to part sun with medium to consistently wet soil, similar to the marshes, wet meadows and ditches where it is often found.
What kind of habitat does Lythrum alatum grow in?: It is typically found in wet prairies, marsh edges, streambanks and roadside ditches where soil stays moist for extended periods.
Is Angled Purple Loosestrife HOA-friendly?: Angled Purple Loosestrife is generally an HOA-friendly choice in the right placement, with low maintenance.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

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.

See all plant problem guides

Ready to grow Angled Purple Loosestrife? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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