Aconitum

Tall flower spikes give Aconitum an unmistakable presence in the border. Commonly known as monkshood or aconite, these hardy herbaceous perennials produce hooded flowers in rich shades of blue, violet, purple and sometimes white, held above deeply divided foliage from summer into early autumn. Their upright habit makes them especially useful for adding height and rhythm through mixed perennial borders, cottage gardens and more naturalistic planting, particularly where a strong vertical accent is needed among softer forms.

Aconitum plants prefer fertile, moisture-retentive soil and are particularly useful in partial shade, although many varieties also grow well in sunnier positions where the ground does not dry out. Once established, aconites form substantial clumps and return reliably each year, making monkshood a valuable choice for the middle or back of a border. Their later flowering period also helps extend interest beyond midsummer, pairing beautifully with grasses, Astrantia, Astilbe and other perennials that enjoy similar conditions.

For UK gardens, Aconitum offers an elegant combination of height, structure and distinctive flower form. Plant several together for a stronger architectural effect or repeat them through a border to create a natural sense of movement. All parts of monkshood are highly toxic if eaten and the sap can irritate skin, so gloves should be worn when handling and plants should be positioned with care where children or pets have access.