How much sun does Two Leaved Senna need?

Two Leaved Senna grows best in full sun conditions.

When does Two Leaved Senna bloom?

Two Leaved Senna blooms in April, May, June, July, August, September, and October.

Where is Two Leaved Senna native?

Two Leaved Senna (Senna roemeriana) is native to NM, OK, TX, per vouchered herbarium specimen records and regional native plant society lists.

What pollinators does Two Leaved Senna attract?

Two Leaved Senna draws butterflies and bees.

Is Two Leaved Senna HOA-friendly?

Two Leaved Senna is generally an HOA-friendly choice in the right placement, with moderate maintenance.

Two Leaved Senna

Name: Pollinator Patch
Author: Pollinator Patch

Senna roemeriana

Last reviewed: October 2026

Toxicity unknown

Two Leaved Senna (Senna roemeriana) 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

12"–36" H × 12"–24" W

Bloom

Apr, May, Jun, Jul, Aug, Sep, Oct

Native to

NM, OK, TX

Pollinators

butterflies, bees

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

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Upload a photo of your yard and Patch Vision shows a rendering of it planted with natives for your region, like Two Leaved Senna.

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Browse plants for this ecoregion

Arizona/New Mexico Mountains Chihuahuan Deserts High Plains Southwestern Tablelands Central Great Plains Cross Timbers Edwards Plateau Southern Texas Plains Texas Blackland Prairies East Central Texas Plains

Two Leaved Senna is a compact native shrub that produces bright yellow flowers from spring through fall. This drought-tolerant plant maintains a neat, rounded form and requires minimal care once established.

In an HOA neighborhood

Two Leaved Senna is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 4 out of 5.

Works well in: foundation, mid zone.

Requires annual shaping to stay compact

Wildlife value

The abundant yellow blooms attract butterflies and native bees throughout the growing season. This plant serves as a host for sulfur butterfly caterpillars.

Common questions

How much sun does Two Leaved Senna need?: Two Leaved Senna grows best in full sun conditions.
When does Two Leaved Senna bloom?: Two Leaved Senna blooms in April, May, June, July, August, September, and October.
Where is Two Leaved Senna native?: Two Leaved Senna (Senna roemeriana) is native to NM, OK, TX, per vouchered herbarium specimen records and regional native plant society lists.
What pollinators does Two Leaved Senna attract?: Two Leaved Senna draws butterflies and bees.
Is Two Leaved Senna HOA-friendly?: Two Leaved Senna is generally an HOA-friendly choice in the right placement, with moderate 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.

See all plant problem guides

Ready to grow Two Leaved Senna? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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