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What does Magnesium and Potassium deficiencies look like in plants? | Solve this with Banana Skins

Updated: Apr 5, 2022

Using the skin of a banana is cheap, easy, and convenient. I love making homemade fertiliser out of things that would otherwise be thrown in a bin. The idea of getting a second use makes it all the more rewarding.

Banana peels are rich in potassium and magnesium, using the skins are a great way of adding these nutrients to your plants.

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1.What does potassium do for plants?

  • Helps plants to manage periods of dryness as it regulates the uptake of water;

  • Necessary for activating plant enzymes;

  • Regulates CO2;

  • Needed to make Adenosine Triphosphate (ATP), which is necessary for photosynthesis and the activation of chemical processes in the plant.

Potassium is considered to be the most important nutrient for a plant second only to nitrogen.

2.What does potassium deficiency look like in plants?

It's yellowing in the leaves. Have a look at the pictures:

3. What does magnesium do for plants?

  • Magnesium helps plants make chlorophyll, which is responsible for the leaves being green.

  • Chlorophyll is needed for photosynthesis, which allows plants to get energy from the sun.

4. What does a magnesium deficiency look like in plants?

If your plants are magnesium deficient then they're going to be yellow colour on the edge of the leaves. Have a look at the examples below:

5. How to use banana skins to prevent deficiencies

  1. Simply take a glass of bottled, distilled or rainwater and soak the banana skin overnight.

  2. The banana skin will turn a slightly darker colour and the water will be slightly brown.

  3. Use this water directly on your plants.



Let me know if you’ll give this a try. Subscribe below for more useful tips and tricks to increase plant growth.