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Zone Zero and the Importance of Tree Canopy

Glendale, CA February 5, 2026 - February 5, 2026

Summary

This document discusses "Zone 0" and the critical role of tree canopy in wildfire resilience, particularly in relation to new state legislation (AB 3074) and defensible space requirements. It outlines various vegetation and tree options for Zone 0, emphasizing that maintenance is far more important than plant choice. The document highlights that any plant can burn under the right conditions, but well-maintained, healthy, high-moisture content plants with open structures are preferable. It also stresses the importance of community cooperation, as embers can travel miles and fire doesn't respect property lines. The presentation includes visual examples from Altadena and discusses the environmental and community benefits of trees, such as cleaner air, energy savings, and wildlife habitat.

Citizen Impact

Residents in high fire-risk areas will need to maintain vegetation near their homes according to new state regulations, with a strong emphasis on pruning, irrigation, and clearing dead material. While specific local ordinances may vary, the core message is that proper maintenance of trees and plants in Zone 0 is crucial for fire safety and may require adjustments to current landscaping practices.

Confidence

high

Sustainability Commission
February 5, 2026