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Penstemon 'Port Wine' AGM

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© RHS 1991

Characteristics

Plant type

Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H3 (half hardy - unheated greenhouse/mild winter)

Colour

Flower

White and Dark Red in Summer

Foliage

Dark Green in Autumn, Spring, Summer and Winter

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

penstemon 'Port Wine'

Family

Plantaginaceae


Penstemon may be deciduous or evergreen perennials or subshrubs, with simple, narrow leaves and racemes or panicles of bell-shaped or funnel-shaped flowers in summer and early autumn

'Port Wine' is a stiffly erect, semi-evergreen perennial to 90cm in height, with narrow dark foliage and panicles or racemes of bell-shaped deep wine-red flowers, the throat white, streaked with dark red

Synonym(s)

  • Penstemon 'Portwine'

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing, East-facing or West-facing
  • Exposed or Sheltered

Cultivation

Grow in fertile, well-drained soil in full sun or partial shade. In cold areas, protect plant overwinter with dry winter mulch

Soil

  • Well-drained
  • Acid, Alkaline or Neutral
  • Sand, Loam or Chalk

Propagation

Propagate by softwood cuttings in early summer or semi-hardwood cuttings in midsummer. Propagate by division in spring

Suggested planting locations and garden types

Cottage/Informal Garden or Flower borders and beds


How to care

Pruning

Deadhead after flowering to maintain vigour. Then cut back to base in early spring

Pests

May be attacked by slugs, snails, glasshouse red spider mite, and leaf and bud eelworms

Diseases

Generally disease free