10-4-12 Granular plant food. High sulfur for optimal pH levels. Scientifically formulated. Carl Pool Hibiscus Food is a complete well balanced plant food specifically designed for all hibiscus varieties. Our Hibiscus Food contains extra Sulfur to optimize soil pH levels, plus plenty of Calcium and Magnesium so that your hibiscus can thrive and build healthy roots, stems and leaves. It is rounded out with a healthy measure of Potassium for bright, beautiful flowers. (10-4-12):