A manganese deficiency closely resembles an iron deficiency. The difference is that manganese deficiency is mainly visible in leaves just below the top of the plant. Additionally, young leaves will get a light leaf colour followed by dark, brown spots. Another difference from an iron deficiency is that the edges of the leaves will remain green. A manganese deficiency also stalls the photosynthetic process of the plant, causing it to grow slower.
How do you recognise a manganese deficiency?
- Looks like an iron deficiency.
- Discolouration of young leaves just below the top.
- Dark spots on the leaf, while the edges remain green.
- Yellowing between the veins of the leaf.
What is the (possible) cause?
- The pH level of the soil or substrate is too high.
- Incorrect fertilisation.
- Disruption of the root environment.
- Too much iron in your soil or substrate.