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Linda from Wheelersburg Oh writes

How often do I apply this Hi-Yield Aluminum Sulfate to my hydrangea to keep it blue?

Answer:

Per the product label: Recheck the pH two weeks after application. If needed, reapply only to those areas where the desirable pH is required to maintain vigorous plants. Hi-Yield Aluminum Sulfate helps create an acid soil condition which is desirable for hydrangeas (blue).  By acidifying the soil, Hi-Yield Aluminum Sulfate can maintain or change the color of Hydrangea flowers. Blue Hydrangeas require Aluminum as an acidifier, to retain their blue color. They should not be fed a Phosphate fertilizer due to the fact that it has a tendency to “tie-up” Aluminum. 

Answer last updated on: 06/24/2019

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Hi-Yield Aluminum Sulfate

Hi-Yield Aluminum Sulfate

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$20.76

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