Lobelia cardinalis 'Black Truffle' - Cardinal flower

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Butterfly FriendlyDeer ResistantRain GardenBird Friendly
Cardinal flower
Lobelia cardinalis 'Black Truffle'

Wonderful in the perennial border and perfect for rain gardens, this cardinal flower is sure to stand out with its dramatic, dark chocolatey-purple foliage and bold red flowers. Superior to other dark-foliaged Lobelias on the market, 'Black Truffle' holds this deep color throughout the growing season. A magnet for hummingbirds and butterflies all summer, but deer tend to leave it alone. Introduced by Peter Heus and brought to market by Angela Treadwell-Palmer of Plants Nouveau.

North Creek Unique™ - This unique assortment has been discovered or introduced to the trade and shared with the world by North Creek Nursery.

  • This is a magnet for hummingbirds and butterflies!
  • The stunning contrast between red flowers and almost black foliage
  • Great for borders, rain gardens, hummingbird gardens
  • A must-have for butterfly gardens
  • It May be used in sunny rain gardens
  • Deer resistant

Native Range

Wet meadows and stream banks; New Brunswick to Minnesota south to Texas and Florida.

Map Credit: The Biota of North America 
Map Key: Green (native), Teal (native, adventive), Blue (present), Yellow (present & rare), Red (extinct)


Interesting Facts


Lobelias are not true perennials because the flowering stem and its associated roots die after setting seed. However, new offsets grow from the axils of the lowermost leaves and quickly put down their own abundant white roots. May self-seed in optimum conditions.




Grow in average to moist soil in full sun to part shade. Grows best in wet, moist organically rich soil in shady areas. Mulch to keep soil moist.


Mature Size: 3-4ft. Tall x 2-3ft. Wide

Hardiness Zone: 5-9

Sun Exposure: Full Sun

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