Espoma Soil Acidifier

The elemental sulfur in this formula lowers the soil pH, which increases the availability of aluminum in the soil. When hydrangeas absorb this aluminum, their blooms shift toward a blue hue.

It is best to avoid using this product on plants that prefer neutral or alkaline soil, as lowering the pH too much can cause nutrient deficiencies or stress for those species. Always test your soil pH first to ensure your plants actually require more acidity.

Because this is a slow-release granular formula, it is designed for gradual soil improvement rather than an instant fix. You should expect to see changes in soil pH and plant health over several weeks or months.

Yes, it is safe for acid-sensitive crops like blueberries. However, because it is a powerful soil amendment, you should apply it carefully around the base of the plants and avoid direct contact with foliage.

For the best results, you can lightly scratch the granules into the top layer of the soil around the drip line of the plant. Watering the area thoroughly after application will help the nutrients move into the root zone.

Soil pH can fluctuate based on your local water source and rainfall, so it is recommended to test your soil annually. Reapply only if your soil test indicates that the pH has risen above the desired range for your specific plants.