Weed Control in Blueberries: Managing Crabgrass and Soil pH

A North Carolina gardener has crabgrass overtaking blueberry rows; pulling isn’t working. Asks about crabgrass preventer and sulfur for pH adjustment.

Non-Chemical Weed Suppression

Use horticultural fabric (landscape cloth) or plastic mulch to block weeds.

Herbicide Caution

Blueberries are sensitive to many herbicides. Consult this WSU guide for approved products and timing.

Soil pH Management

Blueberries need acidic soil (pH 4.5–5.5). Elemental sulfur lowers pH but acts slowly. Apply in fall or early spring per soil test. Avoid aluminum sulfate (toxic to roots).