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Boron Deficiency

Boron is a micronutrient that plants use as soon as it is taken up, meaning it cannot move around the plant once it has been absorbed and fulfilled some purpose. Boron is important to cell wall development & protein synthesis. Since boron is immobile any deficiencies will be evidently present in new leaf growth presenting as stunted growth, tight new growth with little spacing between nodes, and misshapen growth. The leaves can also develop yellowing and mottling to the color of new growth on leaves. Boron deficiency could also be caused by calcium excess since they have an antagonistic relationship.

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Can be caused by:

• Improper pH
• Nutrient Lockout

Preventative: Boron is an element requiring active water movement in the plant for uptake, so understanding transpiration and how to optimize it is key (heat, air, humidity). If there is not enough transpiration then boron will not be taken up as much as necessary.

When working with hydroponic solutions, be sure to check the pH to make sure that it is within a range that will allow plants to absorb the boron. If the pH is too far above 6.5 or approaching 7.0 then there may be issues with boron.

In the case of boron deficiency in soil solutions use a small amount of fertilizer such as Borax or Solubor will help remedy issues. Be VERY CAREFUL with the amount of boron being applied because a toxicity of boron can also occur very easily.

1/4 to 1/5 tbsp of Boric Acid per 4L of water. This will be absorbed very quickly however if applied too much the plant will burn very quickly.