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How to Change the Color of Hydrangeas

How do you get blue hydrangeas?

Hardiness Zone: 8a

By tf1 from GA

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RE: How to Change the Color of Hydrangeas

Rusty nail is for iron deficiencies. I think you add aluminum sulfate to the soil to get the blue color.

Post by c t

RE: How to Change the Color of Hydrangeas

My grandmother always said to put a rusty nail in the ground next to your plant, that will change the color.

Post by vguy

Source: http://www.thriftyfun.com/tf968820.tip.html

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