When does sow-teat blackberry bloom?

Sow-teat blackberry typically flowers from May through July, with white five-petaled blossoms appearing on second-year canes.

What pollinates sow-teat blackberry?

Bees and beetles are the main visitors to the flowers, drawn to the open blossoms and accessible pollen and nectar.

How much sun does sow-teat blackberry need?

It grows well in part shade to full sun, often thriving along woodland margins, fence rows and disturbed open ground where some direct light reaches the canes.

How much water does sow-teat blackberry need?

This shrub prefers medium moisture but tolerates lower water once established, making it adaptable to average garden soil and drier thickets.

Is sow-teat blackberry deciduous?

Yes, its canes and leaves drop in fall, with new growth emerging from the crown and canes each spring.

Is Sow-teat Blackberry toxic to livestock?

The USDA PLANTS Database does not flag Sow-teat Blackberry as toxic to livestock.

Is Sow-teat Blackberry HOA-friendly?

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

Sow-teat Blackberry

Name: Pollinator Patch
Author: Pollinator Patch

Rubus allegheniensis

Last reviewed: September 2026

Sow-teat blackberry is a thicket-forming shrub that blooms white in May, June and July and tolerates part shade with medium water, common along woodland edges and old fields in the eastern and midwestern United States.

Toxicity unknown

Sow-teat Blackberry (Rubus allegheniensis) 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 Sow-teat Blackberry as toxic to livestock.

Light

part shade

Water

medium

Size

36"–72" H × 36"–72" W

Bloom

May, Jun, Jul

Native to

AL, AR, CT, DE and 27 more states

Pollinators

bees, beetles

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Sow-teat blackberry is a native shrub that produces thorny canes and edible blackberries in summer. It forms dense thickets over time and provides white flowers followed by dark purple fruit. The plant spreads by underground runners and can become quite large if not managed.

Growing Sow-teat Blackberry

Grow Sow-teat Blackberry in part shade and medium water. Mature plants reach 36 to 72 inches tall and spread 36 to 72 inches wide. Expect high maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Sow-teat Blackberry 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.

Spreads aggressively through runners
Thorny canes appear unruly
Can look wild and unkempt

Wildlife value

The flowers attract bees and beetles during its long blooming period from May through July. Birds and small mammals feed on the berries, while the dense thickets provide nesting habitat and protective cover.

Common questions

When does sow-teat blackberry bloom?: Sow-teat blackberry typically flowers from May through July, with white five-petaled blossoms appearing on second-year canes.
What pollinates sow-teat blackberry?: Bees and beetles are the main visitors to the flowers, drawn to the open blossoms and accessible pollen and nectar.
How much sun does sow-teat blackberry need?: It grows well in part shade to full sun, often thriving along woodland margins, fence rows and disturbed open ground where some direct light reaches the canes.
How much water does sow-teat blackberry need?: This shrub prefers medium moisture but tolerates lower water once established, making it adaptable to average garden soil and drier thickets.
Is sow-teat blackberry deciduous?: Yes, its canes and leaves drop in fall, with new growth emerging from the crown and canes each spring.
Is Sow-teat Blackberry toxic to livestock?: The USDA PLANTS Database does not flag Sow-teat Blackberry as toxic to livestock.
Is Sow-teat Blackberry HOA-friendly?: Sow-teat Blackberry takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

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.

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