This showy plant produces a tall spire of deep blue tubular flowers, creating a cool, refreshing appearance later in the summer. Like its red cousin, Lobelia cardinalis, it attracts hummingbirds. Tolerates clayey soils.Good for rain gardens. Blooms July-September. Full sun to shade, medium moisture to wet conditions. 1-4'.

Lobelia siphilitica (Great Blue Lobelia)


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