{Apium graveolens var. dulce}

Boron Deficiency in Celery

Brittle stems and the development of brown stripes in the epidermis above the vascular bundles of the petioles are usually the first signs of boron deficiency in celery. Sometimes, the brown stripes are so close together that they form a continuous line over the vascular bundles. Transverse cracks develop on the outer surface. The broken tissue curls outwards, giving the petiole a hairy appearance.

Blackened and diseased hearts are the most severe symptoms, but they are only found in stunted plants, accompanied by cracked petioles.

Typical recommended ranges for boron boradcast soil application for asparagus 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 6-13 6-13
KG/HA 6.75 - 14.63 6.75 - 14.63

Foliar Application (Suggested rates of application)

KG/HA 4.5 - 10.125
Value in Use
Current Yield (Per Acre)
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.

Copyright © 2024 Rio Tinto. All Rights Reserved.