Digitalis trojana

RHS Plant Profile
Helen of Troy foxglove

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Synonyms

Digitalis cariensis 'Trojana'
Digitalis cariensis subsp. trojana

Plants for pollinators
Herbaceous Perennial
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An upright herbaceous perennial producing stems to about 80cm, bearing unusual caramel-brown flowers veined with red, with a conspicuous white lip

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Plantaginaceae
Native to GB/Ireland
No
Foliage
Semi evergreen
Habit
Columnar upright
Potentially harmful
TOXIC if eaten. Wear gloves and other protective equipment when handling TOXIC to pets - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus
Digitalis can be biennials or usually short-lived perennials forming a rosette of simple leaves with bell-shaped flowers in slender, erect, usually one-sided racemes
Name Status
Correct
Plant Range
Turkey

How to Grow

Cultivation

Grow in any free draining soil in sun or partial shade. See foxglove cultivation for further advice

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Cottage and informal garden
  • Mediterranean climate plants
  • Wildlife gardens
  • Banks and slopes
  • Flower borders and beds

Pruning

Cut down flower stems after flowering to encourage a second flowering, and to prevent self-seeding

Pests

May be susceptible to glasshouse red spider mite and glasshouse whitefly as young plants

Diseases

May be susceptible to leaf spot and powdery mildews