Magnesium deficiency and how you solve it
Magnesium is an essential element for plants. Magnesium forms the building blocks for chlorophyll (leaf green) and is therefore essential for the photosynthesis of the plant. In addition, Magnesium has been assigned an important role in the transfer of energy. Magnesium, like calcium, is part of our tap water and affects water hardness. Inorganic magnesium fertilizers are produced on the same basis as those used for potassium fertilizers.
How do I recognize a Magnesium deficiency?
With a shortage of magnesium, the leaf-green in the medium-old leaves is slightly broken under the flowering top. Magnesium is transported to the young parts of the plant. This distribution is visible as rust brown spots and / or vague, irregular yellow spots between the veins. A slight magnesium deficiency has hardly any effect on flowering, but the further the flowers develop, the clearer the symptoms become visible.
Below you will see a graphical explanation of how magnesium deficiency looks like both in the initial stage and in the further development of the plant
What are the symptoms of Magnesium deficiency
Magnesium deficiency is not immediately visible, it is something that develops slowly. In general, you will see the first signs of magnesium deficiency somewhere between the 4th and 6th week
- It starts with the appearance of small, rusty brown spots and / or yellow irregular spots in the leaf of average age (under the top of the plant usually)
- Young leaves and fruits are not affected and will therefore develop normally.
- If nothing is done, the places will increase in number but also in size. The plant looks sick because the symptoms spread throughout the plant.
- If the problem becomes acute, your symptoms will also manifest on the young leaf and flower production will be inhibited
- This creates a Magnesium shortage
A cause for a Magnesium deficiency can be inhibited by, for example:
- Very wet, cold and / or acidic environment of the root
- Large amounts of potassium, ammonia and / or calcium compared to the magnesium amount. (think of high concentrations of calcium carbonate in drinking water or calcium rich clay soils)
- A demanding plant with a limited root system
- Too high EC value in the growth medium, which prevents evaporation.
What is the solution for Magnesium deficiency
- With a proven deficiency you can best spray the plant with a 2% solution of Epsom salts
- When feeding through the roots:
Inorganic: Epsom salts on hydro-culture or kieserite (magnesium sulfate monohydrate)
Organic: Composted turkey or cow manure