Low Level of Potassium in Leaves: Symptoms are Shown During Flowering
Plants suffering from a lack of potassium are smaller and have a short, limp stem. In addition, you can recognise the deficiency by smaller flower tops and pale fruits. Leaves can turn yellow or die off. This starts at the edges. There may also be brown or burned spots visible. A potassium deficiency is initially visible at the older, lower leaves. This is because potassium is mobile. This means the young leaves draw the potassium from the older leaves. Potassium deficiency results in a low yield that is also of a poor quality.
How do you recognise a potassium deficiency?
- Plants are smaller and have a limp stem.
- Smaller flower tops and pale fruits.
- Leaves may have brown spots, brown veins, yellow edges or yellowing veins.
- Plants with a potassium deficiency can absorb less water.
- Reduced yield that is also of poor quality.
What is the (possible) cause?
- Too little potassium in the soil or in the substrate.
- Too much calcium or magnesium content in the soil or substrate.
- Incorrect fertilisation.
- Too much sodium in the root environment.