Boron fertilizer (Granubor, 14.3% B) is priced at $1,800–$2,400 per ton in 2026. At typical agronomic rates of 0.5–1.5 lbs B/acre, boron application costs $1.80–$9.80 per acre — a modest input cost with meaningful ROI on deficient soils. U.S. Borax and Etimine are the primary suppliers.
Current Signal: HOLD
Year-over-year change: +5–10%
| Market / Region | Price Range |
|---|---|
| Granubor (14.3% B) | $1,800 – $2,400/ton |
| Solubor (20.5% B) | $2,000 – $2,600/ton |
| 0.75 lb B/acre cost | $1.90 – $2.80/acre |
| 1.5 lb B/acre cost | $3.80 – $5.60/acre |
Boron is mined as borax/borate ore. U.S. Borax (Rio Tinto) controls the largest reserves in the Western Hemisphere. Chilean and Turkish producers supply additional volume. Supply concentration keeps prices above commodity levels.
Even at elevated per-ton prices, boron's agronomic rate is so low (0.5–2 lbs B/acre) that per-acre cost remains modest. A complete canola boron program (2 lbs B/acre) costs $3.60–$7.80/acre — difficult to skip on deficient soils.
Boron is highly mobile in sandy, low-organic-matter soils. Annual applications are often needed where soil organic matter is below 2%. Split application (half pre-plant, half side-dress or foliar) improves efficiency on leaching-prone soils.
Expanding canola acreage in the northern Corn Belt and northern Plains has increased boron demand. Canola has a critical boron requirement at bud stage, and deficiency causes significant yield and quality loss.
Granubor (14.3% B) is $1,800–$2,400/ton in spring 2026. Solubor (20.5% B, soluble) is $2,000–$2,600/ton.
Canola and sugar beets are the most boron-sensitive crops. Soybeans, sunflowers, and alfalfa show moderate response on deficient soils. Corn is less sensitive to boron deficiency than broadleaf crops.
Hot water extractable boron below 0.5 ppm indicates likely deficiency for sensitive crops (canola, sugar beets). Below 1.0 ppm, most broadleaf crops respond. Above 2.0 ppm, soil boron is adequate for most crops.
Granubor can be broadcast and incorporated or blended with dry fertilizers. Solubor can be added to liquid fertilizer or foliar sprays. Do not apply more than 2 lbs B/acre broadcast on sensitive crops — toxicity is possible at rates above 3–4 lbs B/acre.
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