How to influence the color

The floor is responsible for the color change

First of all, it is important to know that exclusively that pink colored hydrangea species are able to change their color. The tint of the flowers is significantly influenced by these points:

• pH of the substrate
• Aluminum content of the earth
• Initial color of the flowers
• Hardness of the irrigation water

Achieve a color change to pink

So a blue one hydrangea If it bears delicate pink flowers, the pH value must be shifted to the alkaline range. As a result, the plant also absorbs less aluminum and the flower color fades.

Lime the soil around the hydrangea several times a year until it levels off to a pH of around 6. Fertilize the hydrangea twice a year with a special hydrangea fertilizer to which iron is also added. This allows you to prevent the plant yellow leaves, due to iron deficiency, developed.

Sour makes you blue

The most sought-after flower color Hydrangeas is a beautiful blue or deep purple. So that the tint of the flowers increases Discolored to blue the pH of the substrate must be in the acidic range. At the same time, there must be enough aluminum in the earth.

Acidification of the soil

Various means are suitable for this:

• organic material (compost, peat)
• Hydrangea or rhododendron soil
• matured crap
• Sulfur fertilization
• Pour regularly with vinegar water

Increase the aluminum content of the soil

If the substrate has a pH value of 5.2 to 5.5, you can apply hydrangea blue or aluminum sulfate. Check this value at regular intervals with test sticks that you can obtain from gardening shops. Hydrangea blue should always be used in the amount indicated on the packaging. If you prefer aluminum sulfate, you should dissolve two tablespoons of aluminum in five liters of water and water the plant with this mixture.

Tips & Tricks

Before treating with hydrangea blue or aluminum sulfate, it is necessary to water the hydrangea well. This is the only way for the plant to absorb the coloring agent well.