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Common potassium ingredients
(k)
Hardwood ash
This is the original source of potash fertilizers. Hardwood ash can be used as a direct soil additive to increase potassium levels; however, most of the time, it has already been added to the compost for that same purpose.
Kelp meal
Kelp meal is a source of readily available potassium and a variety of micronutrients and plant hormones. This great soil additive can increase overall plant health and vigor.
Greensand
Greensand is a slow-releasing potassium source. Generally speaking, greensand is used to improve soil’s condition rather than boost potassium content.
Langbeinite
Langbeinite is a natural occurring mineral which is water soluble. It is a good source of potassium, sulfur and magnesium.
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