Agastache 'Black Adder' enjoys a remarkably long floral display, from midsummer to fall, of fragrant, tubular, two-lipped red-violet flowers emerging from dense, dark buds and held in bottle-brush, terminal spikes about 6-8 inch long (15-20 cm). Eye-popping, this Agastache will add color and a lovely spiky texture to your garden.
- Forms upright clumps up to 2-3 feet tall (60-90 cm) and 18-24 in. wide (45-60 cm), with aromatic, blue-green leaves which exude an anise scent when crushed.
- Provides a bold visual impact in beds, borders, wildflower gardens, herb gardens, butterfly gardens or prairie gardens over a very long season.
- Ideal to add color in the late season garden when many other plants are fading.
- Creates a stunning effect when mixed with other perennials or planted en masse. Perfect for prairie plantings where it will thrive without maintenance.
- Attracts streams of hummingbirds, butterflies and other beneficial pollinators.
- Easily grown in full sun, in average, dry to medium moisture, well-drained soils. Good drainage is particularly important. Prefers alkaline soils, but will tolerate poor, acid conditions.
- Drought, dry soil and heat tolerant once established.
- Generally disease and pest free (might occasionally be subject to powdery mildew) and resistant to deer and rabbits.
- Deadhead spent flowers to promote additional bloom.