These eye-catching dense, deep blue/purple bloom spikes last for weeks during mid-to-late summer. Gloves should be worn whenever working with this plant, as all parts are poisonous.
Aconitum napellus, Monkshood
Height: 24-48". Spread: 12-18". Full sun to part shade. Needs moist but well-drained soil. Deer resistant. Attracts pollinators.