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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comHave disagreement with my friend and maybe you can help me. He claims to have some 100 100 100 fertilizer, I haven’t seen it. Claims to have used it all. There’s no such thing is there?
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1 Comment To "Fertilizer"
#1 Comment By MichiganDot On 11/28/2017 @ 12:38 pm
The NPK numbers refer to what percent of each measure of fertilizer is Nitrogen, Phosphorus and Potassium. The percents do not add up to 100% because fertilizers are mostly inactive ingredients to carry the NPK plus trace elements. It is mathematically impossible for NPK to add up to 300%. Perhaps your friend is confusing 10-10-10 or is thinking that his fertilizer provides 100% of what his plants need. There is no RDA, recommended daily allowance, for plants but he is thinking along similar lines, perhaps.