How to Fix Nitrogen Deficiency in Plants: The 2026 Recovery Protocol
š The 24-Hour Recovery Protocol Nitrogen deficiency shows as yellowing older leaves while new growth stays green. This happens because nitrogen is mobileāthe plant cannibalizes its lower leaves to feed new growth. Apply fish emulsion (5-1-1) at a dilution of 1 tablespoon per gallon as a foliar spray or root drench for visible improvement within