Aconitum carmichaelii Arendsii

Aconite carmichaelii 'Arendsii' or Carmichael's Monkshood is a perennial that forms an upright clump. Its flowering occurs later in the year, from September to October. This allows it to bring cheer to the garden as one of the few plants that blooms during this period. Very floriferous, its upright and rigid stems bear clusters of numerous large flowers. These clusters measure 20cm (8in) in height. The flowers, shaped like an ancient helmet, take on a bluish-purple hue. It attracts bees and makes the plant melliferous, meaning it contains substances collected by pollinating insects or some birds that will turn into honey.

The foliage of Aconitum carmichaelii is deciduous. With a shiny dark green colour, the veined leaves are deeply divided into 3 to 5 lobes. This broad foliage somewhat resembles that of Delphinium. Originating from Russia to China, it is a very hardy plant. It can reach a height of 1.20m (4ft). It is a tall plant.

Its flowers are delightful as cut flowers. The Blue Monkshood is most often cultivated against a backdrop of flower beds, as well as among bushes sheltered from the wind or against a wall. It is a plant of the undergrowth that is also found on the edge and even in open spaces. It pairs well with Japanese anemones, asters, or plants with autumn foliage. It can also be placed next to late-season plants such as yellow-flowered Rudbeckias. It blends perfectly with white valerian. Known as Jupiter's Helmet, it is a medicinal plant with antispasmodic properties. It is also highly toxic in all its parts, especially the roots.