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Boron deficiency

Boron (B) deficiency is a rare disorder affecting plants growing above a granite bedrock, which is low in boron. Boron may be present but locked up in soils with a high pH, and the deficiency may be worse in wet seasons.

Symptoms include dying growing tips and bushy stunted growth. Crop-specific symptoms include;

Boron deficiency can be avoided by improving the moisture retaining capacity of light soils, and ensuring pH is kept below 7. Borax can be raked into the soil at 35g/sq m (1oz/ sq yd).

Other physiological plant disorders include;