Screwbean Mesquite

Name: Pollinator Patch
Author: Pollinator Patch

Prosopis pubescens

Last reviewed: September 2026

Screwbean mesquite is a small deciduous tree of desert washes and floodplains in the arid Southwest, producing tightly coiled seed pods and pale yellow flower spikes from spring through fall.

Toxicity unknown

Screwbean Mesquite (Prosopis pubescens) 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.

The USDA PLANTS Database (opens in new tab) does not flag Screwbean Mesquite as toxic to livestock.

Light

full sun

Water

medium

Size

120"–180" H × 120"–180" W

Bloom

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

Native to

AZ, CA, NM, NV and 2 more states

Pollinators

bees, nectar insects

Before you buy

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Browse plants for this ecoregion

Mojave Basin and Range North American Deserts Chihuahuan Deserts Sonoran Basin and Range

Screwbean Mesquite is a small native tree with distinctive twisted seed pods and delicate compound leaves. It produces fragrant yellow flower spikes from spring through fall and develops an attractive rounded canopy with age.

Growing Screwbean Mesquite

Grow Screwbean Mesquite in full sun and medium water. Mature plants reach 120 to 180 inches tall and spread 120 to 180 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Screwbean Mesquite is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 2 out of 5.

Works well in: front yard, mid zone.

Trees often require HOA/ARC approval even when allowed.
Verify setbacks from sidewalks, driveways, utilities, and structures.
Confirm mature height/canopy limits and sightline rules for corners.

Wildlife value

The extended blooming period provides nectar for bees and other pollinators from spring through fall. The twisted seed pods are eaten by birds and small mammals.

Common questions

When does screwbean mesquite bloom?: Screwbean mesquite typically flowers from March into November, with pale yellow, fragrant flower spikes appearing in flushes tied to soil moisture and warm temperatures.
What pollinates screwbean mesquite flowers?: Bees and other nectar-seeking insects visit the small, fragrant flower spikes and are the main pollinators of this tree.
How much water does screwbean mesquite need?: It does best with medium water. In the wild it grows along desert washes and low floodplains where roots can reach groundwater or seasonal moisture, but established trees handle long dry spells.
Why is it called screwbean mesquite?: The name comes from its distinctive seed pods, which coil tightly into a spiral or screw shape, unlike the straighter pods of other mesquite species.
Does screwbean mesquite lose its leaves in winter?: Yes, it is deciduous. It drops its small, fern-like leaflets in late fall or winter and leafs out again as temperatures warm in spring.
Is Screwbean Mesquite toxic to livestock?: The USDA PLANTS Database does not flag Screwbean Mesquite as toxic to livestock.
Is Screwbean Mesquite HOA-friendly?: Screwbean Mesquite is generally an HOA-friendly choice in the right placement, with moderate 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 the World Checklist of Vascular Plants (Kew). 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

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In an HOA neighborhood

Screwbean Mesquite is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 2 out of 5.

Works well in: front yard, mid zone.

Trees often require HOA/ARC approval even when allowed.

Verify setbacks from sidewalks, driveways, utilities, and structures.

Confirm mature height/canopy limits and sightline rules for corners.

Common questions

When does screwbean mesquite bloom?

Screwbean mesquite typically flowers from March into November, with pale yellow, fragrant flower spikes appearing in flushes tied to soil moisture and warm temperatures.

What pollinates screwbean mesquite flowers?

Bees and other nectar-seeking insects visit the small, fragrant flower spikes and are the main pollinators of this tree.

How much water does screwbean mesquite need?

It does best with medium water. In the wild it grows along desert washes and low floodplains where roots can reach groundwater or seasonal moisture, but established trees handle long dry spells.

Why is it called screwbean mesquite?

The name comes from its distinctive seed pods, which coil tightly into a spiral or screw shape, unlike the straighter pods of other mesquite species.

Does screwbean mesquite lose its leaves in winter?

Yes, it is deciduous. It drops its small, fern-like leaflets in late fall or winter and leafs out again as temperatures warm in spring.

Is Screwbean Mesquite toxic to livestock?

The USDA PLANTS Database does not flag Screwbean Mesquite as toxic to livestock.

Is Screwbean Mesquite HOA-friendly?

Screwbean Mesquite is generally an HOA-friendly choice in the right placement, with moderate maintenance.

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

Common plant problems, and what to check first

See all plant problem guides