
Black Adder Hyssop (Agastache 'Black Adder')Black Adder Hyssop (Agastache 'Black Adder') is a standout perennial known for its long-lasting spikes of deep violet-blue flowers that attract pollinators from midsummer to fall. With aromatic foliage and an upright growth habit, this variety is ideal for adding color, texture, and wildlife appeal to borders, meadows, and pollinator gardens.Distinctive FeaturesBlack Adder Hyssop produces dense flower spikes in deep blue-violet hues that contrast beautifully against its dark green, anise-scented foliage. A favorite among butterflies, bees, and hummingbirds, this variety thrives in warm, sunny locations and is highly drought-tolerant once established.Growing Conditions Sun Exposure: Prefers full sun for best flowering and growth. Soil: Requires well-draining, moderately fertile soil; tolerates poor soils....
Storage: Refrigerated