Lobelia siphilitica
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Lobelia siphilitica

great blue lobelia

  family campanulaceae 
  genus lobelia 

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Genus  Lobelia Species  siphilitica Variety  Cultivar  Common names  great blue lobelia Family  CAMPANULACEAE Specimen number  S11769 Data source  HtZn p137;HumGrdn p52
Life cycle
Life form  Terrestrial Life cycle  Perennial Life span  3 - 10 years Annual cycle  Not applicable Stature  Flower Growth form  Not applicable Growth habit  Clump forming Overall height  2' - 3' Overall spread   
Sunshine  Full sun Water  Moist Optimal soil texture  Various Acceptable soil pH  Neutral USDA hardiness  USDA zones 03a-09b AHS heat zones  Heat zones 09-02 Sunset climate zones  Not classified
Suitable for gardens  yes Nursery  Unknown Compost  no Size at acquisition  Unknown Garden location  Unknown Garden notes  Lobelia siphilitica attracts hummingbirds. Great blue lobelia can survive very cold winters with annual averages as low as -40� Fahrenheit. This plant needs summer days with high heat. Full sun is ideal for this species. It needs soil that is moist.
Special qualities
Tolerates drought  no Tolerates high humidity  no Tolerates seaside conditions  no Insect resistant  no Disease resistant  no Deer resistant  no Best uses    Symbiosis  Attracts butterflies  no Attracts hummingbirds  yes Autumn foliage  no Colorful berries  no Desirable qualities    Other interest    Other interest color  Other interest period   
Adverse factors
Common pests  Poisonous parts  Poisonous indications  Internal poison  no Dermatologic poison  no Livestock poison  no Mechanical injury  no Hay fever pollen    Hay fever season    Adverse qualities   
Herbal medicine
Medicinal properties  Medicinal parts  Has medicinal uses  no Do not self-administer  no Do no use if pregnant  no Legally restricted  no Toxicity precautions  Medicinal notes 
Traditional uses
Parts used  Traditional uses  Contemporary uses  Fragrance  Fragrance parts  Fragrance intensity    Fragrance category    Dye parts  Dye color 
Propagule  Division   Seed Pollination method    Planting style    Crop spacing    Row spacing    Cold frame  Planting period    Harvesting period    Frost tolerance    Heat requirement    Fertilizer  Typical Time to harvest 
Is edible  no Culinary uses  Nutritional value  Edible parts  Description of edible parts Flavor / texture 
Horticulture notes  Lobelia siphilitica can be propagated by division or by seed. Great blue lobelia is thought to originate from Eastern and Southwestern US.
Tag needs printing  no Collection notes  Lobelia siphilitica is a perennial. Flowers: Great blue lobelia has tubular two-lipped flowers at the ends of 12" to 18" leafy stalks. Blossoms appear in June and continue through August. The flowers are typically of a blue color.

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Last reviewed November 01, 2004   


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