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| Agreed, the debate has been on for over 40 years, whether ortho is better than poly-phosphate fertilizer.
Hundreds of studies have been made, unbiased, and there is "no" difference in plant P uptake with either.
So that means if you have a close relative, or someone you like and want to receive a bigger markup,
go for the high-priced ortho products.
Otherwise choose the poly-phosphate fert. 10-34-0. based on cost per pound of P, it is hands down, the best choice. | |
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Orthophosphate or Polyphosphate
