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Great Blue Lobelia

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Lobelia siphilitica 


Lobelia siphilitica is a popular, upright perennial which produces lavender-blue, tubular flowers crowded together on the upper stem. Ideal for woodland gardens or near ponds.

  • Blooms late summer
  • Like moist conditions but good drainage

Sow direct (after frost)or raise seedlings. 

Sowing Depth Surface sow and press into soil
When to sow in Australia

Tropical: Autumn and Winter 

Sub- tropical: Autumn and Winter 

Temperate: Late winter to Spring

Cold: Spring 


14-30 days at 20 - 22°C
Plant Spacing 30cm
Height 70 - 90cm
Position Full Sun to part shade