Why did my hydrangea blossoms start out blue, then turn green?

The "green problem" will overtake plants of either low or high PH... it's unkown why. It is a temporary problem.

The other users here are not 100 % correct and are missing the problem. Green blooms are a different situation over the normal blue and pinks... green is not a normal bloom.

Green color is not related directly to the PH... yes- the pinks and blues are.... It is yet unknown what causes Hydrangeas to turn green and it is considered to be a sympton to one or more problems.

It is proven to be temporary however.



It is suggested that adding boosters of your choice to the soil will encourage the green to "bloom out" and the plant to return to it's normal state or to what state you have encouraged.



There is a short blog here regrading this very problem.... http://www.hydrangeashydrangeas.com/gree...



I have two booklets regarding Hydrangea and they basically say the same thing in more technical terms.



(I have 17 hydrangeas on the property--- and it happens every once in a while here and there).



I noticed that the plants always are in very good health aside from the green dull color.

Good luck.

Why did my hydrangea blossoms start out blue, then turn green?
it means you have a high amount of acid in your soil. that also means that if you would like you can make them purple, by sticking a few older copper pennies in the ground by the root of the plant. its a very neat trick and your hydrangeas will be different from the rest of the neighborhood.
Reply:They simply turn green as they fade.They will go from green to brownish.Remove the flower head to promote new growth.
Reply:the acidity in the the soil causes the change in the color.
Reply:I'm not all that familiar with hydrangea. I just planted my first one this season, but I think it has something to do with the acidity of the soil.



According to this article all you have to do is add Aluminum Sulfate to your soil:



"Q: How can I keep the "blue" in my hydrangeas? What about fertilizing them?

Soils that contain aluminum and have a low acidity, a pH of 5.2 to 5.5, tend to produce hydrangeas that are bluish to purple. If the blue color seems to be fading from your hydrangeas, add aluminum sulfate, found at your home and garden stores, to the soil around your plants. The presence of aluminum in the soil is what makes them blue. By adding aluminum sulfate, you are lowering the pH of the soil, making the aluminum available to the plant...



Mix one tablespoon of aluminum sulfate per gallon of water needed and apply to plants during the growing season. This can be started as early as the first week in February, but it should not be too late to start the process now. Apply to plants that are already moist to avoid burning the roots.



A light, half-dose of an azalea-camellia fertilizer, applied a few times during the growing season will help keep your hydrangeas healthy, while at the same time help the soil maintain a lower pH"