Dolomitic lime (11% Mg) is the most economical magnesium source at $35–$65/ton applied in 2026. K-Mag runs $480–$560/ton. Epsom salt (foliar) is $300–$400/ton bulk.
| Product | Price | vs. 2025 |
|---|---|---|
| Dolomitic lime per ton | $35–$65/ton | +5% |
| K-Mag Sul-Po-Mag | $480–$560/ton | +6% |
| Magnesium sulfate Epsom | $300–$400/ton | +4% |
Magnesium inputs are stable in price. Apply only where base saturation or tissue tests confirm deficiency.
Dolomitic lime is regionally priced by freight; local availability drives cost more than market factors.
K-Mag is mined from langbeinite deposits in New Mexico; supply is limited but stable.
High soil potassium suppresses magnesium uptake; potash over-application creates secondary Mg deficiency.
Soils with higher organic matter buffer magnesium better; sandy soils need more frequent application.
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