Micronutrients & Why Most 'Deficiencies' Are pH Lockout
The trace elements, the mobility that puts their symptoms in new growth, and the diagnostic discipline that stops you from over-dosing a healthy feed.
Micronutrients — iron (Fe), manganese (Mn), zinc (Zn), boron (B), copper (Cu), molybdenum (Mo) — are used in trace amounts but act as enzyme cofactors and structural/regulatory agents. A reputable base supplies all of them. Yet micro 'deficiencies' are one of the most frequently reported problems in the field — and here is the twist: most of them are not deficiencies at all.
Most field micronutrient deficiencies are pH-driven lockout, not a true shortage. When root-zone pH drifts above ~6.5, Fe, Mn, Zn and B become chemically unavailable even though they are present in the feed. The plant shows a textbook deficiency; the solution is not more nutrient — it is correcting pH. Always confirm pH and EC before you dose.
The rest of this lesson is for members
Unlock every department, SOP, calculator, and setpoint table — plus Leaf, your AI consultant, and interactive diagnostics.
- All 11 departments
- Coco & rockwool tracks
- The full SOP library
- Leaf AI consultant