Broccoli

{Brassica oleracea var. botrytis}

Boron Deficiency in Broccoli

The most common symptom of boron deficiency in broccoli in the field is poor and discolored bud formation, which frequently renders the crop unsuitable for marketing. The pith is liable to develop water-soaked areas, and to become necrotic and ultimately hollow.

An early symptom in young seedlings is the rolling and down-curling of the newest leaves, which are abnormally small, brittle, and deformed. Sometimes leaves have a much enlarged midrib and little lamina. If broccoli is not in bud when the deficiency becomes established, the stem stops growing, giving a flat-topped plant with many side shoots.

Typical recommended ranges for boron boradcast soil application for broccoli is 2-3 lbs of B/acre. Normal plant analysis levels for the best quality and marketability have leaf boron levels in the 25-50 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.

Soil Application (Suggested rates of application)

  Granubor Fertibor
LBS/ACRE 6.25 - 12.5 6.25 - 12.5
KG/HA 7.0 - 14.0 7.0 - 14.0

Foliar Application (Suggested rates of application)

  Solubor
LBS/ACRE 2.5
KG/HA 2.8
Value in Use
Product
Acreage
Current Yield (Per Acre)
Lbs
Expected Sale Price

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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