Multiflora petunias have a more compact growth habit than grandifloras. The flowers are smaller, about 2 inches in diameter, but more prolific, and they hold up better against rain. There is also a wide range of colors. Because of their mounding habit, multiflora petunias are a better choice for garden beds than grandifloras and they work very well in containers.

There are also hybrids of grandiflora and multiflora petunias, which share qualities of both types. A whole new category was created to describe them, known as the floribundas.