Hortensia is also known as Hydrangea. Did you know you can affect the color of Hydrangea by changing the acidity of the soil? Well, not the white one but the others will change colors. More acidic the soil you plant it in is, the color of the flowers will change to blue and more alkaline can turn the blooms into pink.
So basically you can manage to have a range of Hydrangea colors by just changing the nature of the soil. Many people use Miracid which is a fertilizer made by Miracle-Gro and that will turn the Hydrangeas blue. Some people add iron nails around the plant, but you can add aluminum sulfate around the plant in early spring and repeat it later in the season. Everyone has their method of manipulating the Hydrangea color.
At the end of the day, you can change the landscaping style and color without planting or replanting but by adding an additive to the soil. Hydrangeas have become very popular recently both in the garden, potted plants or house plants as well as cutting. Many times even at the supermarket you can see cut Hydrangeas for sale. I guess since they have large globes of the flower just a few branches make a wonderful display of color in any room.