Agastache Black Adder

An exceptional Anise Hyssop valued for its long-lasting, deep violet-blue flower spikes that bloom from dark, near-black calyxes, offering a striking multi-toned appearance. The grey-green leaves emit a powerful liquorice and anise fragrance when handled. It maintains a strong, upright, bushy form that resists deer and acts as a massive magnet for bees. With its tall, elegant, upright stature,  'Black Adder' is the ultimate mid-to-back-of-border plant. It is a staple choice for cottage, Mediterranean, gravel, and modern prairie-style planting schemes. Highly architectural and effortless to grow, it adds sharp vertical interest, irresistible fragrance, and rich texture to sunny garden borders.

The most important thing to remember with this plant is it needs excellent drainage, it will perform quite poorly and can rot over winter if left in waterlogged, heavy clay soil. Plant it in a warm, sunny spot and avoid over-fertilizing, as rich nutrients will cause the stems to grow too fast and flop. It is exceptionally heat and drought-tolerant once established.