Petunia is a popular flowering plant known for its colorful blooms. While there are numerous petunia varieties available, including those with white flowers, there isn't a specific cultivar called "Petunia white" or "Petuniawhite" that I'm aware of. Petunias come in various colors, including white, pink, purple, red, and many more.

White petunias, such as the "Supertunia White" or "Surfinia White" varieties, are commonly available and appreciated for their elegant and pristine appearance. These white-flowered petunias can be found in garden centers, nurseries, or through online plant retailers. They are typically annual plants that require well-draining soil, regular watering, and full sun to partial shade to thrive.