Potassium Fertilizer

Potassium “is important for agriculture because it improves water retention, yield, nutrient value, taste, color, texture and disease resistance of food crops. It has wide application to fruit and vegetables, rice, wheat and other grains, sugar, corn, soybeans, palm oil and cotton, all of which benefit from the nutrient’s quality enhancing properties.”[1]  In nature, these nutrients are more easily regulated by perennials through nutrient transport via root systems and dropping of leaves.  However, like all essential elements in the soil, potassium is easily depleted in monoculture practices.

Potassium is necessary for fruit production, making fruits a prime candidate for harvesting potassium from.  As with the large majority of our fertilizers, we use fermentation processes that occur in nature to concentrate the potassium.

Potassium Fertilizer Recipe

  • 1 kg fruit (we use a mix of mango, papaya and banana; pineapple works well also)
  • 1 kg molasses
Note: You can change the size of this mixtures, just keep the ratios of the ingredients the same.


It’s actually very simple.  Place fruit and molasses in a sealable container (to protect from oxygen and pests).  If the fruit is already beginning to rot, even better because the mixture will be ready sooner.  Monitor your mixture weekly.  Don’t worry if you find maggots or other critters inside; they won’t disrupt your finished product.  When all products have decomposed (except for seeds, fibers and skins) the mixture is ready.  Filter out the liquid into sealable containers for storage.  The pulp and other organic material can be placed on the ground around trees and other crops as a mulch.  This mulch will be nutrient-dense.

The liquid should be diluted when applied to your plants.  We put about 1 cup of potassium liquid in 20 Liters of water (about 1:85 ratio approximately) when spraying a field like rice.  When adding it to the base of plants, we use about half a cup to 8 liters of water (about 1:68 ratio) with the addition of worm castings optionally.

1) Potash Price Close to all time highs – Future Outlook. ASX Release (14 November 2008). activex.com.au. Retrieved on 2013-06-21.