Can You Change the Color of Hydrangea | Stonegate Gardens

It is possible to change the flowers’ colors, but not instantly. Color correction takes weeks-even months. It is easier to change blue flowers to pink than pink to blue, and both are done by changing the pH of the soil. While results are guaranteed, it’s always fun to see what results you can get in your garden – we’ve seen pink, blue and purple all on the same branch!


Before you begin, there are a few things to keep in mind:
  • For best results, wait until the plant is at least 2 years old to give it time to recover from the shock of its original planting.
  • Not all hydrangea varieties can actually change color. Start with the Hydrangea macrophylla variety (pictured above).
  • To get blue flowers, you need to lower the pH, which you can do by adding sulfur, peat moss, or other acidifiers to the soil.
  • To get pink to light red flowers, add ground limestone only around the plant; a pH above 7.5 will result in poor growth, so be careful!
  • Note that hard water can affect the flower color, turning blue flowers more pinkish, so use rainwater to water your hydrangeas if you can.
  • In the fall, hydrangea flowers will naturally fade, often to a combination of pink and green. This is simply the aging process which cannot be reversed.
  • The next year, your new flowers will be their original color, until you add the necessary soil amendments for color changing.

For more information about changing the color of your hydrangeas, stop by and talk to one of our experts!

For more information about hydrangeas in general, check out this article from the Farmer’s Almanac website: