Dwarf Yaupon Holly "Donut" Dieback: Environmental Stress Pattern

Dallas dwarf yaupon hollies (Ilex vomitoria 'Nana') with green center, black ring, green outer growth—environmental stress pattern (heat/drought), not infectious disease.

Pattern Analysis

• Concentric "donut" = growth flushes responding to stress cycles
• Black = dead tissue from past stress (summer 2023 heat/drought?)
• Green center = older hardened growth
• Green outer = new growth after stress relief

Investigation

• Review watering schedule vs. weather data
• Check base for bark damage, girdling roots
• Soil test for nutrient/salt issues
• Photo submission for confirmation

Management

• Consistent deep watering (1" weekly)
• Mulch 3" to dripline
• Fertilize per soil test
• Prune dead ring if unsightly (optional)

Yaupons are tough natives. This pattern suggests past stress survived, not active disease.