Magnesium Deficiency

Interior needles on juniper yellow as magnesium becomes depleted, creating a sparse, yellowed appearance. Apply Epsom salts (magnesium sulfate) to soil (1 cup per 100 square feet) or foliar spray (5 oz per gallon water). Switch to a magnesium-containing fertilizer or add dolomite lime to address the deficiency.

Cultural management is your first line: remove infected material, clean up debris, and improve the growing environment to make conditions less favorable for the pathogen. Avoid wounding plants during maintenance, as many pathogens enter through fresh cuts. Chemical options are available for severe cases, but they work best as preventive treatments applied before symptoms appear.