Black Truffle (Cardinal Flower) - Lobelia cardinalis
Hummingbirds find Black Truffle (Lobelia cardinalis) highly attractive. Its foliage is a stunning deep purple to black, yet the leaves are green at the same time! This Lobelia looks great in any garden, but it looks especially great surrounded by lime green foliage.
Average mature height: Low-growing (up to 48 inches)
Light: Full to part sun
Water:Average watering needs. Do not overwater.
Plant size. These plants ship in 3-inch-deep pots when they are 1.5-6 inches in diameter so they can grow to maturity under your green thumb.