St. Augustine Grass in Central Texas: Fungus, Curb Die-Back, and Organic Solutions

Case Overview

A homeowner in Central Texas reports a well-maintained St. Augustine lawn now showing fungal infection and dying grass along the curb. They have applied lime and fertilizer but seek better guidance.

Expert Response

The responder, Charlotte, advocates an organic approach and offers the following insights:

• Fungus treatment: Recommends baking soda dissolved in water (saturate the area well) as an effective, natural fungicide. Treat the entire yard for best results.
• Lime and fertilizer: Questions the purpose of lime; notes chemical fertilizers can harm beneficial soil microbes. Suggests an organic program for better long-term results with less expense.
• Curb-side die-back: Strongly suspects winter road salt splashing onto the grass from street treatment. Salt damage kills grass along edges and is a common issue in colder regions.
• Need for more info: Requests location details to assess winter severity and provide tailored advice.

Action Plan

1. Apply baking soda fungicide: 1 tablespoon per gallon of water, soak affected areas thoroughly.
2. Investigate whether road salt was used nearby this winter.
3. Switch to organic lawn care: avoid chemical fertilizers and pesticides; use compost, organic fertilizers, and sugar/dry molasses to feed soil microbes.
4. Water deeply and infrequently (1 inch per week) to encourage deep roots.
5. Monitor for recovery; re-plug dead curb areas if needed after salt is leached out.

Why Organic Works

Healthy soil biology supports strong grass that naturally resists disease and pests. Beneficial microbes, earthworms, and predatory insects (lizards, toads, snakes) control grubs and other pests without chemicals.