Mn deficiency in Spathiphyllum

Mn deficiency in Spathiphyllum

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Scientific Name
Manganese (Mn)
Atomic Number
25
Atomic Weight u
54.938
Elemental Group
Micro elements (B, Cl, Cu, Fe, Mn, Mo, Ni, Zn) | Micronutrients
Available Forms

Available forms of Manganese (Mn) for use in Pot and Bedding Plants

  • Manganese sulfate (MnSO₄·Hâ‚‚O or MnSO₄·4Hâ‚‚O) – highly soluble, fast-acting; commonly used in foliar sprays or substrate applications.
  • Manganese oxide (MnO) – slow-release form, used in granular fertilizers.
  • Manganese carbonate (MnCO₃) – less soluble, provides gradual Mn supply.
  • Manganese chelates (Mn-EDTA, Mn-DTPA, Mn-EDDHA) – stable in wider pH ranges, ideal for fertigation or foliar application.
  • Manganese chloride (MnCl₂·4Hâ‚‚O) – soluble, occasionally used in hydroponics or foliar sprays.
  • Manganese frits – glass-fused micronutrient carriers providing slow-release Mn in controlled-release formulations.

Manganese (Mn) Deficiency in Spathiphyllum – Pot and Bedding Plants

Symptoms

  • Interveinal chlorosis on young leaves (yellowing between veins while veins remain green).
  • Leaves may become pale, distorted, or exhibit brown speckling in severe cases.
  • Growth is stunted, and new leaves may be smaller than normal.

Causes

  • Low manganese availability in the substrate, often due to high pH (>6.5) or excessive liming.
  • Over-watering or poor drainage reducing Mn uptake.
  • High levels of competing cations (iron, magnesium, or calcium) in the substrate.

Correction

  • Apply manganese sulfate (MnSO₄·Hâ‚‚O or MnSO₄·4Hâ‚‚O) to the substrate or as a foliar spray.
  • Use manganese chelates (Mn-EDTA, Mn-DTPA, Mn-EDDHA) for substrates with higher pH.
  • Adjust irrigation to avoid waterlogging.

Prevention

  • Regularly test substrate pH and nutrient levels.
  • Maintain pH in the optimal range (5.5–6.5) for Spathiphyllum.
  • Incorporate manganese-containing fertilizers in regular feeding schedules.
  • Avoid excessive liming and monitor competing nutrient levels.

Mn deficiency in Spathiphyllum

Manganese (Mn)
Scientific Name
Manganese (Mn)
Atomic Number
25
Atomic Weight u
54.938
Elemental Group
Micro elements (B, Cl, Cu, Fe, Mn, Mo, Ni, Zn) | Micronutrients
Available Forms

Available forms of Manganese (Mn) for use in Pot and Bedding Plants

  • Manganese sulfate (MnSO₄·Hâ‚‚O or MnSO₄·4Hâ‚‚O) – highly soluble, fast-acting; commonly used in foliar sprays or substrate applications.
  • Manganese oxide (MnO) – slow-release form, used in granular fertilizers.
  • Manganese carbonate (MnCO₃) – less soluble, provides gradual Mn supply.
  • Manganese chelates (Mn-EDTA, Mn-DTPA, Mn-EDDHA) – stable in wider pH ranges, ideal for fertigation or foliar application.
  • Manganese chloride (MnCl₂·4Hâ‚‚O) – soluble, occasionally used in hydroponics or foliar sprays.
  • Manganese frits – glass-fused micronutrient carriers providing slow-release Mn in controlled-release formulations.
Mn deficiency in Spathiphyllum
Image Source: Everris Research (NL), care of ICL

Manganese (Mn) Deficiency in Spathiphyllum – Pot and Bedding Plants

Symptoms

  • Interveinal chlorosis on young leaves (yellowing between veins while veins remain green).
  • Leaves may become pale, distorted, or exhibit brown speckling in severe cases.
  • Growth is stunted, and new leaves may be smaller than normal.

Causes

  • Low manganese availability in the substrate, often due to high pH (>6.5) or excessive liming.
  • Over-watering or poor drainage reducing Mn uptake.
  • High levels of competing cations (iron, magnesium, or calcium) in the substrate.

Correction

  • Apply manganese sulfate (MnSO₄·Hâ‚‚O or MnSO₄·4Hâ‚‚O) to the substrate or as a foliar spray.
  • Use manganese chelates (Mn-EDTA, Mn-DTPA, Mn-EDDHA) for substrates with higher pH.
  • Adjust irrigation to avoid waterlogging.

Prevention

  • Regularly test substrate pH and nutrient levels.
  • Maintain pH in the optimal range (5.5–6.5) for Spathiphyllum.
  • Incorporate manganese-containing fertilizers in regular feeding schedules.
  • Avoid excessive liming and monitor competing nutrient levels.