Jack's Professional 15-15-15 Geranium Water Soluble Fertilizer, 25 lbs.An ideal fertilizer for geraniums and other neutral pH loving plants. The high phosphorus content promotes strong root growth and bud set great for pink hydrangeas. The high nitrate nitrogen content (56%) and the general purpose level of micronutrients help minimize nutritional toxicities on geraniums. For Use On: Geraniums, marigolds, and other plants with media pH requirements above 6. 2 Jacks Professional 15 15 15 Geranium Water Soluble Fertilizer