What form of potassium should tobacco growers avoid?

Tobacco growers should be cautious with potassium chloride because it contains high levels of chloride, which can be detrimental to tobacco plants. Chloride toxicity can lead to a variety of physiological issues in tobacco, such as leaf burn, poor growth, and impact on yield and quality. Furthermore, tobacco is particularly sensitive to chloride, and excess chloride in the soil can adversely affect the plant's uptake of essential nutrients.

While potassium sulfate, potassium nitrate, and potassium borate are generally considered safer options for providing potassium to plants, they do not carry the same risks associated with chloride that potassium chloride does. Therefore, potassium chloride should be avoided to ensure optimal growth and health of tobacco crops.