
Micronutrients are essential for your plants, says Tricia in our video about secondary macronutrients and the micronutrients. You know about the major nutrients, N-P-K. Those are the symbols for the building blocks: nitrogen, phosphorus and potassium. They're represented by the three numbers on the front of fertilizer boxes or bags.
For more about them, check out our video here. With the lesser known micronutrients (like “molybdenum” -- if you can spell that you can probably win a Spelling Bee) you’ll need a lab soil test to know if any need to be added to your soil.
Let’s have a quick look at the major mineral nutrients, and then get to know the micronutrients and find out what they do for your plants.

Magnesium supports chlorophyll production. Add it via dolomite, Diamond K Brand KMS or Azomite.
Sulfur builds protein. Sulfur is released when “greens” like vegetable scraps and lawn cuttings decompose. Add it via gypsum, iron sulfate, and sulfur.
We say “micro” because plants need only small amounts of them. Sometimes they’re even called “trace elements”. They all have a role to play, though. Let’s find out what they are, what they do, and how you can add them to your soil.
Want a supplement for the plants growing in your garden? One that contains many of these micronutrients? Try kelp, glacial rock dust, Azomite or (for fastest results) liquid kelp. Now that you know the basics of secondary macronutrients and the micronutrients, go get a lab test on your soil. Once you have the results, use organic fertilizers to add what you lack -- and you’ll be on your way to a garden full of healthy vegetables and bountiful harvests.