The 12 days of Crop Nutrients

Day 4 

Since I have already lost the theme of this thread (being a tie with the beloved carol, The 12 Days of Christmas), I won’t try to draw a connection between four calling birds and potassium – although I’m sure I could if I tried hard enough.


Potassium in one of the primary plant nutrients. It is essential for the transport of sugars and the formation of starches and oils. Potassium helps to regulate the opening and closing of a leaf’s stoma which are important for the efficient use of water by the crop.

Potassium deficiency in almonds
Apple with a potassium deficiency
Potassium deficiency in grapes







Potassium also promotes root growth, increases a plant’s resistance to disease and cold temperatures. It improves the size and quality of fruits, nuts and grains, and is essential in high-quality forage. Crops that produce large amounts of carbohydrates (sugars) require large amounts of potassium – sometimes even more th an nitrogen! Cotton, almonds, alfalfa, grapes, cherries, and peaches are all especially fond of potassium.


Common symptoms of potassium deficiency:

  • Slow growth
  • Tip and marginal leaf burning
  • Burning of older leaves
  • Weak stems and stalks causing lodging
  • Low fruit sugar content and shriveled seeds
Corn with a potassium deficiency