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Great blue lobelia in the GardenTags plant encyclopedia

Lobelia siphilitica 'Blue'

 

Great blue lobelia

Original:This blue counterpart of the Cardinal Flower blooms bright blue in late summer. The erect, 60cm stems produce lavender-blue, tubular flowers crowded together on the upper stem. New:The White Cardinal Flower is a clump-forming perennial with upright leafy stems. It bears dense spikes of white, tubular flowers from summer through until autumn. It thrives in moist conditions, so it is a great plant for a bog or waterside location.

Contributed by @reedie-cottsge

 
plant Features
  • Great blue lobelia likes full sun to partial shade

    Full sun to partial shade

  • Great blue lobelia likes occasional watering

    Occasional watering

  • Great blue lobelia is frost hardy: 23f (-5°c)

    Frost Hardy: 23F (-5°C)

  • Great blue lobelia likes moist and fertile

    Moist and fertile

 
plant information

Common name

Great blue lobelia

Latin name

Lobelia siphilitica 'Blue'

type

Herbaceous Perennials

family

Campanulaceae

ph

5.0 - 8.5 Acid - Neutral

  • Light

    Great blue lobelia likes full sun to partial shade

    Full sun to partial shade

  • Frost

    Great blue lobelia is frost hardy: 23f (-5°c)

    Frost Hardy: 23F (-5°C)

  • Soil

    Great blue lobelia likes moist and fertile

    Moist and fertile

  • Water

    Great blue lobelia likes occasional watering

    Occasional watering

Plant & bloom calendar

  •  
    Best time to plant
  •  
    When the plant will bloom

full grown dimensions

The size of a fully grown Great blue lobelia is 0.40meters x 0.70meters 0.40 M 0.70 M

Lobelia siphilitica 'Blue'

Original:This blue counterpart of the Cardinal Flower blooms bright blue in late summer. The erect, 60cm stems produce lavender-blue, tubular flowers crowded together on the upper stem. New:The White Cardinal Flower is a clump-forming perennial with upright leafy stems. It bears dense spikes of white, tubular flowers from summer through until autumn. It thrives in moist conditions, so it is a great plant for a bog or waterside location.


Flowering Season

From Mid Summer TO Mid Autumn

It bears dense spikes of light white, tubular, two-lipped flowers from summer through until autumn.

 

Planting Outdoors

From Early Spring TO Mid Spring

Dig well rotted compost or manure into the soil before planting out in a moist site.

 

Propagation by seed

From Late Winter TO Early Spring

Sow seed under glass, when big enough to handle either pot on or plant out into flowering position when the soil has warmed up.

 
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Gardeners who are growing this plant