Calcium deficiency

Calcium deficiency

A calcium deficiency leads to various growth disorders, such as deformed buds and deformed leaves. The tips of the leaves often curl up and there is a brown discolouration (dots) on the leaves. The first symptoms will be visible on the new leaves. The spots usually don’t appear on the lowest leaves, but on those just above. Plants with calcium deficiency remain smaller and have a poor fruit quality due to, for example, nasal rot on tomatoes. The yield can be less.

How do you recognise a calcium deficiency?

  • Tips of older leaves curl up
  • Brown spots can be seen on the leaves
  • Yield stays behind in quality and quantity
  • Dark green leaves
  • Weak trunk
  • Flowering starts to early

What is the (possible) cause?

  • pH level is too low in the soil or substrate
  • EC value is too high in substrate or in soil
  • Too high of a potassium or magnesium content in the soil or substrate
  • Too little or incorrect fertilisation
  • Salt stress
  • Drought stress

How can you prevent it?

Choose your potting soil or substrate carefully. Arrange the soil quality your plants need. Plagron Supermix contains, for example, living fungi and bacteria, vitamins and minerals, trace elements, worm castings and seabird guano for optimal development of the plant.


How can you cure it?

If the EC value is too high, it is wise to rinse the soil or substrate with clean water. This also applies to the pH value. Calcium is best absorbed when the pH value is between 6.2 and 7.0. Calcium Kick is a pH regulator that increases the pH value to the ideal range. Note: excess calcium may cause confinement of potassium, magnesium, iron and manganese.


What does calcium do for the plant?

Calcium is essential for plant building, because it plays a role in cell division. In addition, calcium promotes the construction and strengthening of the cell walls. Because calcium binds with pectin, cell walls become firmer. Pectin and calcium provide a cross-linked connection. Pectin has the property to stick cells together. In addition, calcium helps in metabolic processes, the response to environmental and hormonal signals and development and the functioning of the root system.
Calcium deficiency
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