A saguaro oozing black tar-like substance has advanced rot. Location matters: if high, the top may be saved; if low and structural, the 16,000-lb plant could fall unpredictably—even opposite its lean. Immediate action needed. Photos, height, arm count, and lean direction determine options. If base is compromised, hire a certified cactus horticulturist (Arizona Dept. of Agriculture: 602-542-4631; Desierto Verde: 480-423-0202; Cactus Sales: 480-963-1061; Cactus Doctor: 602-465-0566). Permits required for removal/relocation. Do not attempt DIY on large saguaros—fatalities occur. Prefer relocation over destruction; they're protected and iconic.
Follow-Up Care for a Toppled Columnar Cactus: Stabilization and Recovery
Identifying a Mystery Columnar Cactus
Fixing Severe Etiolation on a Tall Indoor Cactus ("Cactus Jack")
Diagnosing and Saving a Rotting Potted Saguaro
Saguaro Turning Black Inside: Fatal Rot from Cold or Water
Trimming 8-10 ft Cacti Growing Through Patio Screen: Need ID First
20-Foot Cactus in New Hampshire: Won't Survive Freeze, Must Cut or Heat
Saguaro Fruit vs. Bud: Correct Propagation from Fallen Reproductive Parts
Wedding Symbol Cactus Rotting at Base: Overwatering Rescue
Cactus Soil Substitute: Potting Soil + Sand
Barrel Cactus Root Rot: Diagnosis and Limited Options
Saguaro Gas Exchange: CAM Photosynthesis, Night Stomatal Opening
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