Aconitum 'Cloudy' is a gorgeous bicolour monkshood with blue and white flowers.

The tall stems and purple-blue flowers of the monkshood Aconitum 'Arendsii' offer a substitute for Delphinium for shadier conditions.

Aconitum 'Royal Flush' has spires of purple-blue monkshood flowers preceded by luscious chocolate-red new growth.

Aconitum fischeri is a shorter monkshood to two feet with purple-blue flowers.

Japanese monkshood, Aconitum japonicum, has wonderful, hooded purple-blue flowers in summer on arching stems.

Aconitum lamarckii (syn. pyrenaicum) is an unusual monkshood with long airy racemes of pale sulphur yellow tubular flowers.

Aconitum napellus forms strong, vertical spires of purple-blue monkshood flowers.

Aconitum 'Album' has deeply cut ferny dark green leaves with bold white spikes of hooded monkshood flowers. Elegant.

Aconitum 'Rubellum' is a distinctly different monkshood with pretty pink flower spikes.

Aconitum 'Bicolor' is an elegant and gorgeous bicolour monkshood with white and blue flowers.

Aconitum 'Eleonara' has mostly white flowers with a hint of blue on the petal tips. Elegant and beguiling.

'Stainless Steel' is a unique steely blue Aconitum that makes a great spike for sun or shadier conditions.

Aconitum 'Blue Lagoon' is a dwarf monkshood with bright blue flowers.

Aconitum 'Spark's Variety' has four foot tall spikes of hooded, deep violet-blue monkshood flowers.