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Tag: hydrangea color

How to Change the Color of Your Hydrangea Flower
Posted on  by Prunin Arboriculture & Landscape

If you’ve ever appreciated a hydrangea bush blooming in different pastel shades, you’ll be delighted to learn that by using a simple scientific trick you can easily modify the bloom color! The color of a hydrangea flower varies according to the pH level of the soil it’s growing in, except for the white ones that are resistant to any color change.

change-the-color-of-your -hydrangea-flower

How to Change Your Hydrangea Bloom Color

You can quickly transform the color of your hydrangea flowers into colors like pink, blue, purple, and more by following the steps mentioned here:

Select Right Hydrangea Type

The foremost step is to make sure to buy the right variety of hydrangea bloom for your garden that can change color to give you the flower color of your choice. For example, the macrophylla (also called mopheads and lacecaps) variety is among the most suitable species of hydrangea that can change color.

Measure Soil pH

Use a soil review kit to detect the pH level of your soil. This is important because the hydrangea bloom color depends on the soil pH in which it is grown:

  • Blue flowers with acidic soil having a pH level of 5.5 or lower
  • Pink flowers with alkaline soil with a pH level of 6.5 or higher
  • A palette of blue, pink, and purple shades with a pH level between 5.5 and 6.5

If you want to observe your soil’s pH during the plant’s growing period, you can set up a probe that will provide readings on both the soil’s pH and its moisture content.

Adjust Soil’s pH Level

You can use a few household tricks, like applying composted oak foliage, pine needles, or coffee grounds to achieve blue hydrangeas. Whereas, applying wood ashes, lime, or fertilizers with significant levels of phosphorus to stop aluminum from flowing into the plant’s system, gives hydrangeas the pink color.

Treat Your Soil Right

Now, that you have learned how to tweak the soil pH to obtain the bloom color of your fondness, remember that the key is to apply it especially at the beginning of the growing season and to re-apply all through the growing season. Also, water them right, because too much water can damage your plants.


The soil pH is prone to change every year, depending on factors like the kind of fertilizer, or mulch you use. Therefore, it’s essential to continue treating the uppermost layer of soil surrounding the root area to maintain the flowers in the preferred shade. This process can last for months, so you need to be patient.