For best results, apply every 7-14 days, just like a thorough watering. Use this high phosphorus formulation during periods of bud set to increase the number and size of blossoms. Great for vegetable production!

Hydrangea Blue 7-3-3 is a unique combination of high quality nutrients and aluminum sulfate designed to produce lush leaves and enhance and maintain blue color in many pink and blue varieties of hydrangeas. If the hydrangea is planted next to a concrete foundation or in high alkalinity soil, it will be especially beneficial. It will not change the color of white hydrangea varieties.