I LOVE this plant! I grow verbena in containers every year but have never had a verbena be so healthy and so large and so beautiful! The color is a rich purple, the flowers are like round golf balls and when they fade they have a silvery tone to it. My containers are spectacular this year and it is thanks to Imperial Blue verbena.
Superbena® Cobalt™ Verbena hybrid
- Part Sun to Sun
Superbena verbena have great vigor, awesome branching and wonderful summer performance. The deep blue-purple flowers are clustered in large umbels that cover the deep green foliage.Award WinnerContinuous Bloom or RebloomerDisease ResistantLong BloomingFall InterestHeat TolerantDeadheading Not NecessaryAttracts:ButterfliesResists:Deer
CharacteristicsPlant Type:AnnualHeight Category:ShortGarden Height:6 - 12 InchesTrails Up To:24 InchesSpacing:10 - 14 InchesSpread:18 - 30 InchesFlower Colors:BlueFlower Colors:PurpleFlower Shade:Dark Blue PurpleFoliage Colors:GreenFoliage Shade:GreenHabit:Mounding TrailingContainer Role:Spiller
Plant NeedsLight Requirement:Part Sun to Sun
The optimum amount of sun or shade each plant needs to thrive: Full Sun (6+ hours), Part Sun (4-6 hours), Full Shade (up to 4 hours).Maintenance Category:EasyBloom Time:Planting To FrostHardiness Zones:8a, 8b, 9a, 9b, 10a, 10b, 11a, 11bWater Category:AverageSoil Fertility Requirement:Average SoilUses:Border PlantUses:ContainerUses:GroundcoverUses:LandscapeUses:Mass PlantingUses Notes:
Superbena are great in landscape beds, but are also wonderful in patio planters and hanging baskets by themselves. They also make a wonderful spiller in combination recipes.Maintenance Notes:
These are heat tolerant plants, that aren't particularly fussy. They need little routine maintenance. They will perform best if an application of controlled release fertilizer is included at the time of planting. This applies to both landscape and container plantings. The plants aren't particularly heavy feeders, so a single dose is usually sufficient for landscape beds in most climates. If you have a very long season, a second application of controlled release plant food should be considered for landscape beds. In general, containers need to be fed more than landscape plants. A second application of a controlled release fertilizer should be applied about every two months to container plants or you can regularly apply water soluble fertilizer starting about two months after the containers are planted. These extra applications of plant food can really make a difference in performance through the summer.
If your plant begins to look open or a bit tired, an allover trim can be beneficial. Use a sharp pair of scissors or pruning shears to trim back up to 1/3 of the volume of the plant. I pair any trim with a dose of water soluble fertilizer to provide instant energy to help kickstart new growth, branching and flowering. Your plant will take a week to recover from the trim, but the end result is a fuller plant with more blooms going forward. You may repeat the trim as needed through the season.Superbena® Cobalt™ Verbena hybrid 'WNVESBIB' USPP 34,099, Can PBRAF
534321Browse reviews from people who have grown this plant.
Denise Wilson, Ontario, Canada, 1 year ago
amazing colour and shape easy to growlucy, Ohio, United States, 1 year ago
First time in a large self-watering planter. Everything I planted is healthy and beautiful. The superverbena is amazing. Love the color.Sandra Avery, 1 year ago
Award Year Award Plant Trial 2022 Top Performer - In Ground South Dakota State - McCrory Gardens 2021 Top Performer University of Florida - Fort Lauderdale 2021 Perfect Score Oregon State University 2021 Top Performer - Hanging Basket University of Minnesota - Grand Rapids 2021 Top Performer University of Minnesota - Morris 2021 Top 10 scores in beds North Carolina State, JC Raulston Arboretum 2021 Top Performer University of Georgia 2021 Top Performer Oklahoma State University Botanical Gardens 2021 Top Performer University of Tennessee - Knoxville 2021 Perfect Score Michigan State University4 More in this series3 More Recipes