Organic Soil Acidifier is designed to create the perfect growing environment for acid-loving plants like hydrangeas and blueberries. This natural, long-lasting solution lowers soil pH, turning hydrangeas blue and improving berry production. Made with elemental sulfur and gypsum, it’s a safer alternative to aluminum sulfate and meets the highest organic standards. Why Gardeners Love It:Turns hydrangea flowers blueBlueberries, blackberries, raspberries, potatoes, ferns, and hostas also thrive in acidic soilGentle on people, pets, and the planetApproved for organic gardening