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(More customer reviews)Potassium or potash (the "K" in N-P-K) is often overlooked, because low levels don't produce any obvious deficiency symptoms.
Nonetheless it is vital to plant and animal metabolism. It is often referred to as the "quality" nutrient. Roses, in particular like very high levels of K.
I like to use wood ashes as a source of K -- They're free and contain lots of trace minerals but ash is very alkaline, and you can't use very much. Sul-Po-Mag is pH neutral so you can use quite a lot if necessary. Besides that, it contains significant amounts of sulphur and magnesium - two secondary nutrients that are also often overlooked and frequently deficient.
Great product, especially in sandy soils where Potassium leaches away readily
Click Here to see more reviews about: Sul-Po-Mag, 50 lb.
A naturally occurring mineral containing significant quantities of sulfur, potash, and magnesium. Application rate: 20 lbs. per 1,000 sq. ft. once per year on soil deficient in these minerals.
Buy cheap Sul-Po-Mag, 50 lb. now.
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