What does soil pH have to do with fertilizer?
The pH needs to be in a proper range in order for the nutrients to be available to the plant. The optimum soil pH for boxwood is between 6.5 and 7.2. If the pH is below the recommended range, add dolomitic lime. This lime has low oxide content and will persist in the soil for 4‑7 years depending on application rates and soil type. If the pH is above 7.5, then lowering the pH would be in order. This is accomplished by adding iron sulfate. Your County Extension Service is an excellent resource for recommendations for properly adjusting soil pH. A soil test probably will be needed. Top [excerpted from the BOXWOOD HANDBOOK A Practical Guide to Knowing and Growing Boxwood available from the American Boxwood Society for $25.
The pH needs to be in a proper range in order for the nutrients to be available to the plant. The optimum soil pH for boxwood is between 6.5 and 7.2. If the pH is below the recommended range, add dolomitic lime. This lime has low oxide content and will persist in the soil for 4‑7 years depending on application rates and soil type. If the pH is above 7.5, then lowering the pH would be in order. This is accomplished by adding iron sulfate. Your County Extension Service is an excellent resource for recommendations for properly adjusting soil pH. A soil test probably will be needed.
