What is Manganese Deficiency in plants?

Manganese (Mn) is an essential trace element critical for chloroplast function and photosynthesis. Deficiency restricts energy production, limits growth, and directly impacts crop quality and uniformity.

As Mn deficiency appears in new growth, it is often visible in spring flushes. Now is the ideal time to inspect overwintered crops and correct deficiencies before peak spring sales.

What are the symptoms of Manganese deficiency in plants?

The most recognisable symptom is interveinal chlorosis, yellowing between veins – while veins remain green, creating a net-like pattern.

As deficiency progresses:

• Brown speckling develops (a key differentiator from iron deficiency)
• Chlorotic tissue may become necrotic
• Leaves reduce in size and growth becomes stunted
• Flowering, fruit set and root development decline
• Older leaves may show reddish or purplish margins.

Manganese Deficiency in Kalmia

Manganese vs. iron deficiency — how to tell the difference?

• Mn deficiency: brown specks present; veins remain green
• Iron deficiency: no specks; entire leaf yellows, including veins

How to manage Manganese Deficiency in plants?

Manganese deficiency occurs in new leaves, so can be found in new spring growth. With symptoms similar to iron deficiency, how do you tell the difference?

• Mn deficiency causes brown specks, and a lack of iron does not
• With Mn deficiency, leaf edges and veins remain green – while with iron deficiency they do not – the whole leaf turns yellow.

Now is a good time to inspect overwintered crops for signs of nutrient deficiency – to rectify any issues before the important spring sales season.

Manganese Deficiency in Spathiphyllum

How to manage Manganese deficiency in plants?

To prevent Mn deficiency, we recommend Micromax Premium.  A premium granular trace element package, it delivers all essential micronutrients, including Mn, in one application.

• Long-lasting supply (up to 16 months)
• Optimised availability, even above pH 6.5
• Improved nutrient efficiency
• Easy and safe to use
• Included in Levington Advance bagged and bespoke mixes.

Designed to support strong establishment, consistent growth and improved commercial returns.

How to correct Manganese Deficiency in plants?

To correct Mn deficiency, we recommend Peters Professional Foliar Feed (27-15-12+TE). A fast-acting, 100% water-soluble fertiliser ideal for rapid foliar correction.

• Immediate plant response
• Trace elements remain available via M-77 chelating complex
• Efficient uptake and quick visual improvement

What else should growers consider?

• pH matters: High pH reduces Mn availability; very low pH increases toxicity risk.
• Growing media: Some bark sources contain high Mn levels — quality matters.
• Irrigation management: Over-irrigation can leach Mn from media.
• Nutrient balance: Mn deficiency can disrupt iron and calcium uptake.
• Plant resilience: Deficient crops are more susceptible to pests and disease.

Regular monitoring and early intervention protect crop performance, visual quality and profitability.

Manganese Deficiency in Pieris