Organic Gardening How To | Changing Hydrangea Colors
Hydrangeas are such a beautiful bush with big, lovely flowers that bloom from spring to fall. I have two in my yard – one has blue flowers and one has pink. This Organic Gardening How To is about why hydrangea flowers have different colors and how you can easily change those colors if you want to.
There are three standard colors for hydrangea flowers – pink, white, and blue.
Hydrangeas are unique in that it’s the soil that they are planted in that will determine their flowers color. Acidic soils produce a blue flower and less acidic soils produce the white and pink flowers.
If you have blue hydrangeas, you can change them to pink. If you have pink hydrangeas, you can change them to blue. Only the Almighty can change the color of the white hydrangea.
Watch this Organic Gardening How To video on how you can change your pink hydrangeas to blue one’s if you choose to do so:
So, if you have hydrangeas in your garden, you can change their flowers color by slightly changing their soils pH level.
If your hydrangeas have pink and you would like to make them blue, you now know that your soil needs to be slightly more acidic. You can add Bonide Organic Aluminum Sulfate 
For blue hydrangeas, it’s best to shoot for a pH level between 5.0-5.2.
Be cautious! If you add too much aluminum sulfate you will damage the plants root system and possibly kill the plant. If you have time, you can also increase the soils acidity level by mixing peat or coffee grounds into the soil.
If you presently have blue hydrangea flowers and you would like to make them pink, you can do that my adding Good Earth Organics Hydrated Lime
One last tip to this Organic Gardening How To – it’s best to make these changes to your soils pH level in early spring before the hydrangea blossoms.
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