Lobelia siphilitica

Great Blue Lobelia, Blue Cardinal Flower, Big Blue Lobelia, Great Lobelia

Family: Campanulaceae Bellflower


Type Perennial
USDA Hardiness range 5A - 9B
Exposure Full shade to full sun
Bloom color Blue
Bloom time Late Summer to Late Fall
Water needs Moist to wet
Landscape uses Border, massing, woodland garden
Height 24" to 4' / 60cm to 1.20m
Spread 6" to 12" / 15cm to 30cm
Growth rate Moderate
Persistence Deciduous
Bloom attributes Attracts butterflies, suitable for cut flowers
Leaf color Green
Fruit color n/a
Soil pH requirements Acidic, neutral
Soil type Loamy
Form Upright or erect
Attributes and features Attracts birds, native to North America, invasive, naturalizing