Very popular! Polymer-coated aluminum sulfate is slow-release for better uptake by plants, and lowers pH for blue hydrangeas and wonderful azaleas and rhododendrons!
This Florikote Sapphire formula has been carefully engineered for maximum plant benefit. It is designed to increase the development of the blue flower color in blue hydrangeas. Sapphire uses a proprietary controlled release polymer-coated Aluminum Sulfate. Lowers pH as it increases acidity. Once you try it, your plants will want no other aluminum sulfate! 50 lb bag.
Specs
Polymer coated aluminum sulfate
3 to 4 month formula
Not fertilizer; there are no nutrients in it, just aluminum sulfate
