How much sun does Cow Vetch need?

Cow Vetch grows best in part shade conditions.

When does Cow Vetch bloom?

Cow Vetch blooms in May, June, and July.

Is Cow Vetch toxic to livestock?

The USDA PLANTS Database does not flag Cow Vetch as toxic to livestock.

Is Cow Vetch HOA-friendly?

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

Cow Vetch

Name: Pollinator Patch
Author: Pollinator Patch

Vicia cracca

Last reviewed: August 2026

Toxicity unknown

Cow Vetch (Vicia cracca) 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 Cow Vetch as toxic to livestock.

Light

part shade

Water

medium

Size

12"–48" H × 12"–36" W

Bloom

May, Jun, Jul

Pollinators

bees

Native alternatives to Cow Vetch

Cow Vetch 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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Cow vetch is a climbing perennial vine that produces clusters of purple-blue pea-like flowers from May through July. This legume can spread aggressively through underground rhizomes and self-seeding, making it better suited for naturalized areas than formal landscapes.

In an HOA neighborhood

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

Works well in: backyard only.

Aggressive spreader that can become weedy
Climbing habit may look unkempt without support
Can overwhelm nearby plants

Wildlife value

The flowers attract bees and other pollinators during its extended bloom period. As a legume, it also fixes nitrogen in the soil.

Common questions

How much sun does Cow Vetch need?: Cow Vetch grows best in part shade conditions.
When does Cow Vetch bloom?: Cow Vetch blooms in May, June, and July.
Is Cow Vetch toxic to livestock?: The USDA PLANTS Database does not flag Cow Vetch as toxic to livestock.
What pollinators does Cow Vetch attract?: Cow Vetch draws bees.
Is Cow Vetch HOA-friendly?: Cow Vetch 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.

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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