is verbena perennial
Printer Friendly Version (PDF). Verbenas are long blooming annual or perennial flowers that possess the virtues of heat tolerance and an extremely long bloom season. Many perennial verbenas are relatively short lived, but their vigor and heavy flowering make up for this defect.They do well grown as annual flowering plants also, since they bloom quickly during the first season after planting. âHomestead Purpleâ Verbena (Glandularia canadensis), known for its long bloom season.railing Verbena (Glandularia canadensis; formerly Verbena canadensis): Trailing verbena is a native perennial throughout South Carolina. The plants have a low spreading form and will flower profusely all summer.