Verbena is a genus in the family Verbenaceae. It contains about 250 species of annual and perennial herbaceous or semi-woody flowering plants. The majority of the species are native to the New World from Canada south to southern Chile, but some are also native in the Old World, mainly in Europe.
from Wikipedia:
Verbena has long been associated with divine and other supernatural forces. It was called "tears of Isis" in Ancient Egypt, and later on "Juno's tears". In Ancient Greece, it was dedicated to Eos Erigineia. In the early Christian era, folk legend stated that Common Vervain (V. officinalis) was used to staunch Jesus' wounds after his removal from the cross. It was consequently called "Holy Herb".
Care - it's simple and easy to grow, blooming from Spring to Autumn.
Watering: regular when newly planted and until plant is well established. Then, water when it's dry.
Seeds may take up to a month to germinate, so it takes some patience in the beginning.
When it starts blooming. you'll have to remove the faded blooms so that it will go on blooming.
It needs much sun and for many hours a day, so you could also plant it in the garden. Just make sure to leave enough space (~15cm) between plants.
Fertilizing isn't necessary more than once a year.






