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Home Page » Home & Garden » Gardening » Verbena: Verbena rigida Polaris

Verbena: Verbena rigida Polaris

Other common names: vervain

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Verbena: Verbena rigida Polaris

'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

Plant typetender-perennial
Hardiness zones8 to 11
Lightfull-sun--afternoon-shade-in-hot-areas
Height up to 1 ft.
Spread up to 2 ft.
Habitspreading
Soil pHslightly-acidic-to-neutral-pH6.5-7
Soil moistureaverage
Bloom timefall,summer
Flower colorpurple
Bloom size2 in. to 2 in.
Foliage colormedium-green

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:

  • Attractive Flowers
  • Attractive Foliage
  • Attracts Butterflies
  • Attracts Hummingbirds
  • Drought Tolerant
  • Fragrant

garden uses:

  • Containers
  • Flowerbed borders

other uses:

    combine with:

    other warm-weather annuals, including 'Blue Daze' and ageratum.

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