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Lobelia siphilitica

Lobelia siphilitica

Cardinal Flower - Big Blue

Big Blue Lobelia has clear blue flower spikes appearing in August and September, attracting hummingbirds, butterflies and insects. Does well in full sun, even more than L. cardinalis. Very wet site tolerant, and naturalizes well from seed.

Height 36 Inches

Spread 18 Inches

Bloom Color Blue

USDA Hardiness Zone 4

Companion Plants to Lobelia siphilitica

Eupatorium maculatum 'Phantom'
Joe Pye Weed

Chelone lyonii 'Hot Lips'
Turtlehead

Carex grayi
Gray's Sedge

Similar Plants to Lobelia siphilitica

Asclepias incarnata 'Cinderella'
Swamp Milkweed

Scutellaria incana
Hoary Skullcap

Vernonia lettermannii 'Iron Butterfly'
Narrowleaf Ironweed