Ideal for acid-loving plants like Azalea, Rhododendron, and Hydrangea, this high-purity organic soil amendment will safely lower the pH of your soil and last for months. Boasting a 30% Sulfur content (18% free, 12% combined) and a controlled release formula, this fertilizer safely and effectively raises the Sulfur level and pH of your soil. Apply 6 pounds per 50 square feet for each 1 point of soil pH reduction you desire. To determine how much acidifier to apply, take a soil test. A slower way to tell how basic your soil has become is to watch your Hydrangeas: the blooms will turn from pink to blue as the pH drops! It is better to step down the soil pH gradually, because a drastic jump can cause stress to your plants.
Espoma Soil Acidifier is greatly preferable to Aluminum Sulfate, because our Acidifier has twice as much Sulfur, lasts much longer, is all natural, and is not toxic to plants or animals. Our Soil Acidifier also has a very low salt index compared to other soil acidifiers, preventing it from burning your plants.
Soil Acidifier recommended for all of the following acid-loving plants: Amaryllis, Andromeda, Aster, Azalea, Bayberry, Bleedingheart, Blueberry, Camellia, Dogwood, Evergreens, Ferns, Fir, Gardenia, Heath, Heather, Hemlock, Holly, Huckleberry, Hydrangea, Inkberry, Juniper, Leucothoe, Lily-of-the-Valley, Lupine, Magnolia, Marigold, Mountain-ash, Mountain-laurel, Oak, Pacheysandra, Phlox, Pieris, Pine, Raspberry, Rhododendron, Spruce, Strawberries, Whitecedar, and Woodsorrel. Weight: 6 pounds.