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you need to apply aluminum sulphate (aluminum sulfate) or acidfy the soil somehow. Hydrangea blueing agent containing aluminum sulphate is available form garden centres. Follow thw instructions carefully as too much can be detrimental to plant health.

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13y ago

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How do you keep hydrangea zorro flowers blue?

you have to change the pH of the soil. go here the website does a good job explaining it and helping you with the change http://www.hydrangeashydrangeas.com/colorchange.html


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Hydrangeas grow different colored flowers depending on the pH of the soil.


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No, coffee grounds do not keep hydrangeas blue on their own.Specifically, the blue blooms on the hydrangea are the result of the plant being able to take aluminum from the soil into the roots. Aluminum has to be in soluble form for plant root intake. A soil that is too dry impedes adequate aluminum intake and therefore proper blue blossoming. Coffee grounds work to retain moisture in soil.


Are hydrangea leaves toxic to children?

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How can I best preserve hydrangea flowers to maintain their beauty and freshness for a longer period of time?

To preserve hydrangea flowers, cut the stems at an angle, place them in water immediately, and keep them in a cool location away from direct sunlight. Change the water every few days and mist the flowers with water to maintain their freshness.


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To preserve hydrangea flowers, you can cut the stems at an angle, remove leaves below the water line, place them in a vase with fresh water, and keep them in a cool location away from direct sunlight and drafts. You can also try drying or pressing the flowers for long-term preservation.


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