Also, the flowers don't hold up as well during rainy weather. Plants often become unkempt and straggly by late summer. While the flowers on the multiflora petunias are smaller than the grandifloras, they produce many more flowers. There are both single and double flowered multiflora petunias. Multifloras are generally more compact and resistant to wet weather than the grandifloras.
Single multifloras are excellent in mass plantings in flower beds.
Double multifloras are most suitable for containers. Some petunia varieties are categorized as floribundas. These are actually modern multiflora petunias. The modern multifloras possess slightly larger flowers and are more compact than older multiflora varieties. Some of the modern multifloras include the Madness, Carpet, Polo, and Celebrity Series.