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Verbena: Verbena rigida PolarisOther common names: vervain
![]() 'Polaris' vervain, a tender perennial usually grown as an annual, produces flat clusters of sweetly fragrant, bluish-purple flowers from summer until fall. Upright to spreading in habit, this is an excellent plant for containers, and it also performs well in the front of borders. Profile
did you know?Some verbena species resemble plants that were used for medicinal or ceremonial purposes, known in Latin as verbenae, hence its Latin botanical name, general maintenance:Deadhead spent blooms to promote flowering. In Zones 7 and colder, remove plants after frost. pests/diseases:Aphids, whiteflies, and powdery mildew may occur. controls:Regularly hose off aphids and whiteflies, or apply insecticidal soap, following label directions. To discourage powdery mildew, space plants for adequate air circulation and avoid wetting foliage when watering. Remove and destroy severely infected plants, and pick off infected leaves where practical. how to sow/plant:After last frost, choose a sunny, well-drained site, amend with compost or well-rotted manure, and set out young plants at a distance just shy of plants' mature spread. Or direct sow in spring after last frost. water and fertilize:Maintain soil moisture all season. Apply a balanced water-soluble fertilizer biweekly or a slow-release fertilizer, following label directions. garden hint:If you garden in the South, plant vervain in a spot that has dappled shade during the hottest part of the day. Established plants are drought tolerant but perform better if watered regularly. features:
garden uses:
other uses:combine with:other warm-weather annuals, including 'Blue Daze' and ageratum. |
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