Hi-Yield Fertilome Soil Acidifier Plus Iron

If your acid-loving plants like azaleas, gardenias, or hollies are showing yellowing leaves with green veins—a condition called chlorosis—it often signals that the soil pH is too high, preventing them from absorbing nutrients. A simple soil test kit can confirm if your pH levels are above the ideal range for these varieties.

This product is formulated specifically for acid-loving plants. Using it on plants that prefer neutral or alkaline soil can cause nutrient deficiencies or stress, so it is best to reserve this treatment for species like roses, hydrangeas, gardenias, and azaleas.

To apply, mix 2 tablespoons of the concentrate per gallon of water. Ensure you mix it thoroughly before applying it to the soil around the base of your plants.

No, this is a soil amendment, not a complete fertilizer. While it provides essential micronutrients like iron and zinc, it does not contain the primary macronutrients (nitrogen, phosphorus, and potassium) that plants need for overall growth, so you should continue your regular feeding schedule.

While the soil chemistry begins to adjust shortly after application, plant recovery is a gradual process. You may notice improved leaf color within a few weeks as the plant begins to uptake the iron and other micronutrients more efficiently.