We regularly get calls or e-mails from people who have problems with their pepper plants, especially at the end of the summer. People often forget that for a fruit-bearing crop like a pepper plant, it is very important to fertilise properly. And that can be done perfectly well with general plant food/nutrition that you can find in many shops.
On the site, worldofchillies, you will find a nice infographic explaining the well-known deficiency symptoms you can see in chillies.
Herewith an overview, so that if your pepper plants are not looking that happy, you can find out what’s wrong with them. And if you are completely desperate because your plants are failing, there is always the possibility of ordering your necessary portion of peppers via our webshop.

Iron deficiency- The new leaves have parts of yellow & white between the veins it can spread all over the leaf.
Calcium Deficiency- Deformed new leaves and heads, curled, crumpled. The old leaves remain unaffected.
Nitrogen Deficiency- The old leaves first turn yellow, then more and more leaves turn yellow from the stem to the tip of the leaf.
Potassium deficiency- The leaf edges of especially the young leaves turn yellow, the yellow and dead spots may later become holes in the leaf.
Magnesium deficiency- The old leaves turn yellow from the tip to the stem, the veins remain green.
Manganese deficiency- Old leaves show yellow spots and holes form between the veins.
Phosphorus deficiency- Old leaves turn dark green purple, it spreads through the plant if not noticed.