Can ashes of burnt up brush and lumber spread around citrus trees be harmful?



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    Citrus trees tend to like more acidic soil with a pH around 5.5-6.5. Ashes are alkaline and could potentially lower the acidity of the soil causing harm to the tree. In small amounts, they most likely won’t harm the tree though. However, in other cases they are actually beneficial to soil. Generally, ashes contain potassium, vital to plant nutrition. Ashes are also alkaline and can help neutralize acidic soils. Too much ash can result in raising the soils salinity and harming the plant. The general approach to using ash on soil is 5-10 pounds per 100 sq. feet on freshly tilled soil, then raked in. In order to prevent harm to the plants, the application of ashes should be limited to once a year. 

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