3x Blue Cardinal Flower - Lobelia siphilitica - 9cm Pots

Code: PL0711
3x Blue Cardinal Flower - Lobelia siphilitica - 9cm Pots
Blue Cardinal Flower - Lobelia siphilitica - 3x 9cm Pots

The Blue Cardinal Flower is a clump-forming perennial with upright leafy stems. It bears dense spikes of light to bright blue tubular, two-lipped flowers from summer through until autumn. It thrives in moist conditions, so it is a great plant for a bog or waterside location.


  • Foliage Colour: light green in spring, summer and autumn
  • Flower Colour: blue in summer and autumn
  • Approx. Growth Height: 70cm
  • Max. Spread: 40cm
  • Flowering Time: summer and autumn
  • Planting Time: spring
  • Uses: in ponds, bog gardens, wildflower gardens
  • Exposure: sheltered
  • Growing Habit: clump-forming, erect
  • Hardiness: hardy
  • Rate of Growth: max. height in 2-5 years


  • Light Requirements: partial shade, full sun
  • Moisture: poorly drained or moist but well drained
  • Soil requirements: acidic, neutral, alkaline, chalky, loamy, sandy, clay


Plant in deep, fertile, permanently moist soil in a full sun or partial shade location. Suitable for edging, near water, or in a mixed or herbaceous border.

Caring and Maintenance

This is a very hardy, low maintenance plant. Water adequately during dry and hot periods. Optionally, fertilise every two weeks in spring and early summer to improve flowering. Plants may be trimmed as they die back in particularly hot summers.


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