Displaying an upright and clump-forming habit, this deciduous herbaceous perennial boasts finely toothed, lance-shaped leaves in a refreshing shade of light green. As summer transitions to autumn, Lobelia siphilitica takes centre stage with its enduring spikes of true blue tubular flowers. These vibrant blooms grace sturdy, upright stems, creating an enchanting visual display in reliably moist or boggy garden settings.