St. Augustine Spring Green-Up Problems in Texas

Symptoms: Patchy Green-Up After Mild Winter

Three-year-old St. Augustine in Texas: high-traffic areas green, rest dormant with sporadic sprigs. Owner suspects winterkill from sudden cold snaps.

Why Winterkill Is Unlikely

If high-traffic areas (most stressed) are green, roots are alive. Winterkill hits stressed areas first. The issue is likely delayed spring transition due to:

• Cool nights keeping soil temperatures low.
• Excessive thatch/dead leaf material blocking sunlight.
• Insufficient early spring watering.

Action Plan

1. Scalp mow: Set mower to lowest setting, bag clippings. Removes dead material, warms soil faster.
2. Water deeply: 1 inch weekly if no rain. Starch mobilization needs moisture.
3. Light fertilizer: 0.5 lb N/1,000 sq ft with phosphorus (e.g., 18-46-0 or starter). Roots need nutrients to initiate growth.
4. Patience: Warm nights will trigger full green-up. Stolons with green sprigs are alive.

Stolon Health Check

Pull a runner: if black, hollow, mushy = dead. If white/firm with green nodes = alive. Most will be alive.

Don't Panic

St. Augustine is tough. Consistent warmth + water + light feeding = full recovery in 2–3 weeks.