Exposure
Height
Soil Type
Other Attributes
HYSSOP
Agastache ‘Black Adder’
Vivid blue flower spikes. Bottle-brush-shaped flowers. 30 – 36″ tall. Fragrant foliage. Begins blooming in July and goes until frost! Full sun – light shade; average to dry well-drained soil. Old flower stems add nice winter interest. Excellent in combination with grasses! Deer resistant. Attracts hummingbirds & butterflies. North American native species. Zone 6.