Mn deficiency in Kalanchoë

Mn deficiency in Kalanchoë

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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·H₂O or MnSO₄·4H₂O) – 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 (MnCl₂·4H₂O) – 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 Kalanchoë – Pot and Bedding Plants

Symptoms

  • Interveinal chlorosis (yellowing) of younger leaves while veins remain green.
  • Leaf distortion or reduced leaf expansion.
  • Slower growth and reduced flowering.
  • In severe cases, necrotic spots may develop on leaves.

Causes

  • Low availability of Mn in the substrate, often due to high pH (>6.5).
  • Excessive levels of other cations (e.g., Fe, Mg, or Ca) competing with Mn uptake.
  • Poorly aerated or waterlogged soil reducing Mn solubility.

Correction

  • Foliar application of soluble Mn sources (e.g., manganese sulfate or chelated Mn).
  • Substrate supplementation with Mn-containing fertilizers.
  • Adjust irrigation to avoid waterlogging and improve root uptake.

Prevention

  • Use substrates with adequate Mn content.
  • Maintain substrate pH in the optimal range for Mn availability (around 5.5–6.5).
  • Avoid excessive use of competing cations (lime, Fe, Mg).
  • Regularly monitor plant tissue for early detection of deficiency.

Mn deficiency in Kalanchoë

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·H₂O or MnSO₄·4H₂O) – 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 (MnCl₂·4H₂O) – 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 Kalanchoë

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

Symptoms

  • Interveinal chlorosis (yellowing) of younger leaves while veins remain green.
  • Leaf distortion or reduced leaf expansion.
  • Slower growth and reduced flowering.
  • In severe cases, necrotic spots may develop on leaves.

Causes

  • Low availability of Mn in the substrate, often due to high pH (>6.5).
  • Excessive levels of other cations (e.g., Fe, Mg, or Ca) competing with Mn uptake.
  • Poorly aerated or waterlogged soil reducing Mn solubility.

Correction

  • Foliar application of soluble Mn sources (e.g., manganese sulfate or chelated Mn).
  • Substrate supplementation with Mn-containing fertilizers.
  • Adjust irrigation to avoid waterlogging and improve root uptake.

Prevention

  • Use substrates with adequate Mn content.
  • Maintain substrate pH in the optimal range for Mn availability (around 5.5–6.5).
  • Avoid excessive use of competing cations (lime, Fe, Mg).
  • Regularly monitor plant tissue for early detection of deficiency.