Calcium Deficiency in Plants: Plant Leaves Turning Brown and Curling Up
A calcium deficiency leads to various growth disorders, like deformed buds and leaves. The tips of the leaves will curl up. Brown spots will also be visible on the leaves. The deficiency starts in the new leaves, but its symptoms will first show on the middle leaves. Plants with a calcium deficiency will remain smaller and have a poor fruit quality. The yield is usually lower.
How do you recognise a calcium deficiency?
- You will see brown spots, starting at the new leaves.
- The tips of older leaves will curl up.
- The yield will be less and of poorer quality.
- The leaves will go dark green.
- The stem will be weaker.
- Your plants will start flowering early.
What is the (possible) cause?
- The pH value of the soil or substrate is too low.
- The EC value of the soil or substrate is too high.
- The levels of potassium or magnesium in the soil are too high.
- Too little or incorrect fertilisation.
- Salt stress.
- Drought stress.