The best choice for dry boron fertilizer:
Now with 15% boron

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The element of growth

Boron helps to feed the world for the future

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Granubor
and the 4Rs

By choosing the right source for boron in compound fertilizers, you can increase yields and profitability. 

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Better Crops from the Ground Up

Boron deficiencies affect almost all major crops grown around the world. Learn how high-quality boron from U.S. Borax can help improve crop yields and farm profits.

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Boron and Better Crops (all crops)

Increase yields by up to 37 bushels per acre (39.8 kg/ha). Refined Boron makes a substantial difference in your crop production.

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Boron: Helping feed the world

Educational Video

Agriculture needs to become increasingly efficient to feed a growing population. As an essential element for crop growth, boron has a vital role to play. Watch video

Boost crop quality and your bottom line with
U.S. Borax.

You care about crops—and so do we.
That's why U.S. Borax mines and refines only top-quality boron, free of unwanted contaminants.
Granubor
B 15.0%
Made especially for bulk blenders

A pure, 100% water-soluble micronutrient that meets boron demand during the growing season. Made especially for bulk blenders, Granubor helps to ensure uniform distribution in nutritional blends and in the field. Learn more

Chemical
  • Boron (B) 15%
  • Material required for 1 lb (.45 kg) of B 7 lb (3.18 kg)
  • Derived from sodium borates
Physical
  • SCREEN % CUMULATIVE
  • -4 Trace
  • +12 95
Bulk Density
  • Loose pack 57 lb/ft3 (913 kg/m3)
  • Tight pack 60 lb/ft3 (961 kg/m3)
  • Angle of repose 30°
  • Tight pack 280
Containers
  • Granubor is available in bulk, 2500 lb (1134 kg) super bags or 50 lb (22.7 kg) plastic bags.
Solubor
B 20.5%
Product of choice for foliar applications

A concentrated, highly soluble, and fast dissolving powder that is ideal for foliar and other sprays. With the highest concentration of boron in any approved product, Solubor is an economical choice for nutritional formulations. Learn more

Chemical
  • Boron (B) 20.5%
  • Material required for 1 lb (.45 kg) of B 4.9 lb (2.22 kg)
  • Derived from sodium borates
Physical
  • SCREEN % CUMULATIVE
  • +200 8
  • -200 92
Bulk Density
  • Loose pack 25 lb/ft3 (400.46 kg/m3)
  • Tight pack 35 lb/ft3 (560.6 kg/m3)
Containers
  • Solubor is available in 1700 lb (771 kg) super bags, and in 50 lb (22.7 kg) multiwall paper bags with a polyethylene moisture resistant barrier.
Fertibor
B 15.0%
Optimum product for suspensions

A fine crystalline borate ideal for NPK compound fertilizers and suspensions. Manufactured as free-flowing granules, Fertibor is easily handled and offers superior flow and consistency. Learn more

Chemical
  • Boron (B) 15.0%
  • Material required for 1 lb (.45 kg) of B 6.7 lb (3.04 kg)
  • Derived from sodium borates
Physical
  • SCREEN % CUMULATIVE
  • 8 Trace
  • 200 98
Bulk Density
  • Loose pack 63 lb/ft3 (1009 kg/m3)
  • Tight pack 71 lb/ft3 (1137kg/m3)
Containers
  • Fertibor is available in bulk, 2500 lb (1134 kg) super bags or 50 lb (22.7 kg) plastic bags.

Locate Boron Solutions for Your Region

Africa
Africa
Throughout Africa, soils can benefit from application of refined boron. This vast region comprises a multitude of climates, soil types and crops. The dominant soils of Africa are inherently infertile, and their quality is degraded further by climatic conditions. Frequent droughts and pervasive sandy soils mean that most growers here can see higher yields and greater ROI by using refined boron. Learn More
Australia and New Zealand
Australia and New Zealand
Australia and New Zealand are well known for their expansive landscapes and thriving agricultural industry. With numerous areas of volcanic or sandy soil and fairly high rainfall, refined boron can enhance crop growth and development. Learn More
China
China
China is the world’s largest agricultural economy, feeding one fifth of the global population on just over one-tenth of its arable land. China's food security is dependent on making the best use of its limited arable land and water resources. Like many regions of the world, China’s soil suffers from boron deficiency. Understanding the value of boron can help Chinese growers improve soil nutrition and continue to meet the country’s production needs long into the future. Learn More
Europe
Europe
European growers face boron-depleted soils, especially given the demands of widespread crops such as rapeseed. Most growers here are aware of the need for micronutrient supplementation. Refined boron can help, and offers a variety of application methods to meet growers’ needs. Learn More
India and Bangladesh
India and Bangladesh
Growers in this region have a high agricultural demand for boron, which is especially deficient throughout Bangladesh and eastern India. Monsoon patterns and depletion from the variety of high-yield crops in the area mean that refined boron supplementation is vital to help prevent fruit and flower drop and protect growers’ livelihoods. Both family growers and larger land holdings can benefit from the application of high-quality, highly available refined boron. Learn More
Latin America
Latin America
Latin America—comprising Mexico as well as countries throughout Central America, South America, and the Caribbean—is a vital contributor to the world’s food and agricultural resources. With a great deal of farmable land and a wide range of available crops, this region relies on boron for optimal yields. Learn More
North America
North America
The United States and Canada encompass vast swaths of rich farmland that feed much of the world. From the corn fields of Illinois, to the apple orchards of Ontario, to California’s fertile Central Valley, agriculture fuels regional economies. Boron is essential for healthy crop yields, yet it is the second-most deficient nutrient across North America. Correcting boron deficiency requires an understanding of multiple factors—including weather, geography, soil conditions, and crop requirements. Since these elements vary widely across the U.S. agricultural landscape, growers need to tailor their micronutrient approaches to conditions in their region. Learn More
Southeast Asia
Southeast Asia
This region fluctuates between drought and heavy rains and is characterized by sandy soils in many areas. These conditions increase boron deficiencies, which can harm valuable crops such as rice, tropical fruits, and oil palm. Many growers in Southeast Asia can benefit from improving soil health with boron supplementation. Learn More

Boost Crop Quality with Boron

See how different crops benefit from boron supplementation and get crop-specific information.

Get Expert Advice

Want to learn more about how boron can help to grow better crops?
Our experts are here to help.
Punit Antal
Punit Antal
Agriculture Sales Manager Bio
Wendall Boehlje
Wendall Boehlje
Technical Sales Agronomist, North America Bio
Adam Brodie
Adam Brodie
Senior Sales Manager, Americas Bio
Flavio Barcellos Cardoso
Flavio Barcellos Cardoso
Technical Sales Agronomist, South America Bio
Weng Kee Ch'ng
Weng Kee Ch'ng
Technical Sales Agronomist, Southeast Asia Bio
Friedrich Fendel
Friedrich Fendel
Sales Manager Bio
Mary Beth Garrison
Mary Beth Garrison
Senior Advisor, Communities and Communications Bio
Jaime Gonzalez
Jaime Gonzalez
Regional Sales Manager, Latin America Bio
Abigail Jiang
Abigail Jiang
Agronomist, China Bio
Andreas Karatzis
Andreas Karatzis
Sales Manager | France, Spain, Portugal, and Greece Bio
Lucy Meng
Lucy Meng
Regional Marketing Manager, China Bio
Amit Narain
Amit Narain
Sales Manager, India and Southwest Asia Bio
Henri Ngoh
Henri Ngoh
Manager Sales, Southeast Asia Bio
David Petitjean
David Petitjean
Manager, Sales Borates and Lithium Europe Bio
Vincenzo Restivo
Vincenzo Restivo
Regional Sales Manager | UK, Ireland, Benelux, and Italy Bio
Glenn Ross
Glenn Ross
Sales Manager, Australia/New Zealand Bio
Cleiton de Sequeira
Cleiton de Sequeira
Global Market Development Manager, Agriculture Bio
Fabiano Silvestrin
Fabiano Silvestrin
Regional Sales Manager, South America Bio
George Zhang
George Zhang
Country Sales Manager, China Bio

Solving Growing Pains in Indian Agriculture

:: Monday, September 16, 2019 :: Posted By Punit Antal
Solving Growing Pains in Indian Agriculture
When people think of India’s economy, many think of its exploding service and technology sectors. Yet for decades, agriculture has played a major role in India’s socioeconomic growth.

The Challenges of Boron Fertilizer Management

:: Tuesday, August 6, 2019 :: Posted By Cleiton de Sequeira
The Challenges of Boron Fertilizer Management
Boron deficiency can make it extremely difficult for a plant to grow to its full potential. Most plants are not able to remobilize boron from old to new tissue as with other nutrients, such as nitrogen. Understanding whether a nutrient is mobile or immobile in plants and the available solutions to correct boron deficiency can help you overcome this problem and enjoy a fruitful harvest.

Not All Boron Fertilizers Are Created Equal

:: Friday, July 19, 2019 :: Posted By Adam Brodie
Not All Boron Fertilizers Are Created Equal
When choosing a boron supplement for your crops, you really do get what you pay for. Not all borate products produce the same quality or level of useable boron, so price is not necessarily the best measure of true return on investment (ROI).

U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 500 customers with more than 1,700 delivery locations globally. We supply 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles east of Los Angeles.  Learn more about Rio Tinto

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