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Tomato

{Lycopersicum esculentum}
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Boron deficiency in tomatoes

The first sign of boron deficiency in tomatoes is a terminal chlorosis on the younger leaves. In severe cases, the young leaves are grossly misshapen and the growing points die. The stems are short and thick. Failure to set fruit is common and the fruit may be ridged, show corky patches, and ripen unevenly.

Typical recommended ranges for boron boradcast soil application for tomatoes is 1-2 lbs of B/acre. Normal plant analysis levels for the best quality and marketability have leaf boron levels in the 30-80 ppm range.*

*Always consult local crop advisors to check the proper dose rates. Rates of boron fertilization should be based on yield goals along with soil tests and/or plant tissue analyses.

Tomato Resources
Brochure: Boron in Vegetables (PDF)

Spotting boron deficiency in tomatoes

Boron deficiency in tomato plant

Tomato fruit with boron deficiency.

Tomato brown chlorosis leaf

Chlorosis on boron-deficient tomato leaves.

Tomato with poor leaf development and aborted fruit

Poor tomato leaf development with aborted fruit.

U.S. Borax products for tomatoes

15% Boron | | OMRI Certified
Fertibor
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.

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15% Boron | | OMRI Certified
Granubor
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.

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20.5% Boron | | OMRI Certified
Solubor
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.

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20.8% Boron
Anhybor
Boron for fertilizer manufacturing

This refined U.S. Borax product is made from the dehydration and fusion of borax. Depending on the grade, Anhybor can be used to produce boron-enriched compound fertilizers or to coat different fertilizer products, such as NPK blends with the aid of a binder.

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10% Boron | | OMRI Certified
Solubor Flow
For fertigation or hydroponic growing

First and only aqueous suspension of sodium borate microcrystals.

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14.5% Boron | 29% Zinc
Zincubor
Perfect combination of zinc and boron

Because zinc and boron deficiency are widespread around the world, a product with both nutrients is a good fit in many regions. Zincubor brings these two important micronutrients together in one product.

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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 650 customers with more than 1,800 delivery locations globally. We supply around 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles northeast of Los Angeles. Learn more about Rio Tinto.

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