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Give your crops full access to boron

Granubor | 15% Boron | 100% Soluble

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Granubor > Overview

Proven to correct boron deficiency and improve crop yields

With Granubor^®, you get what you pay for. Granubor is the only pure, 100% water-soluble granular boron product on the market. Its unmatched solubility provides crops with a fully available and reliable source of boron throughout the growing season. Ultimately, you get higher yields.

See how Granubor delivers a greater ROI than unrefined alternatives.

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Granubor
Made in the USA

15% boron (100% water soluable)
Proven to deliver a higher ROI
Refined for purity
Uniform particle sizes
OMRI Listed^®
Perfect for bulk blend or direct soil application

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Don't pay for boron that doesn't work

Ulexite isn't 100% available to plants. That forces you to:

Apply more

Ulexite products release at less than half the rate of Granubor (40%). That means you’ll apply more product to equal just one Granubor application.

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Sacrifice more yield

Boron deficient crops can limit yields by 1-4% annually. Ulexite’s partial solubility leaves plants prone to boron deficiency.

See how boron impacts yield

Spend more

Unrefined products can cost up to 2.5 times more over a growing season.

See why unrefined costs more

Purity matters: Protect your soil’s health

Choosing Granubor is the smartest choice for protecting soil’s long-term health. We mine a special, highly pure form of borate ore and then refine it with physical means only. We do NOT use chemical treatments. So, when Granubor reaches your fields, you won’t have to worry about any harmful contaminants accumulating and compromising future yields.

Pure ingredients only

Our refining process removes arsenic and other heavy metals. Unrefined products often contain high levels of impurities.

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Organic and traceable

Granubor comes from one of the world’s cleanest borate sources. Every batch is OMRI Listed, made in the USA, and traceable.

Learn more: OMRI certification

Field tested, research backed

We’re a trusted leader in borates research and actively invest in studies to show why purity is so important.

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Proven consistency

Granubor features consistent particle sizes and a release profile that aligns with crop needs. You can feel confident that you’re supplying the right amount of boron at the right time.

Even size, even distribution

We subject every batch of Granubor to tight screening parameters (-4 and +14 mesh), making it easier for you to distribute evenly in the field.

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Perfect for blending

Granubor’s average particle size (2.8mm) is a perfect fit for bulk blending. Consistent sizing also minimizes risk during bagging, transport, and application.

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Crush resistant

Featuring a particle strength of 9 lb per granule, Granubor can withstand force and resist crushing, while maintaining extremely low dust content.

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Addressing boron deficiency

Boron is an essential micronutrient that enables healthier and higher crop yields. Therefore, preventing and correcting boron deficiency is key to optimal growth.

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