The Calibrachoa Superbells ½ Trailing Rose, 'Calibrachoa hybrids', is a fantastic annual hybrid from Proven Winners. Calibrachoa is very similar to a minature Petunia. This vigorous fast growing plant produces hundreds of vividly colored rose flowers that bloom from spring until first frost. Calibrachoa Superbells are easy to grow. Place them in full sun, shade will severely limit the number of flowers. You can expect hummingbirds to visit your garden when you plant Calibrachoa because they love the large trumpet shaped flowers and it¦s good nectar source.For zones 9-11, this plant can also be a perennial.