pH Lockout? (Leaves Pale But EC Fine)
Wrong pH blocks uptake even when feed is correct; leaves pale or spotty.
pH lockout cannabis? EC fine but leaves pale—reset pH and analyze fast.
Common Causes
- pH too low/high in root zone
- Uncalibrated meter
- Drift from additives
- No runoff to reset salts
How to Tell Which One You Have
EC seems OK but plant shows multi-nutrient stress; runoff pH off-range.
FAQ
Fix?
Flush/replace with balanced pH, recalibrate meter.
Best pH soil?
6.2–6.5; coco/hydro 5.7–6.1.
How fast recovers?
New growth improves first; old damage stays.