About
Tanacetum herderi is a species in the tansy genus Tanacetum, a member of the Asteraceae. As with many Tanacetum species it produces composite flower heads with yellow disc florets and arises from forms typical of the genus. Flowering in the UK occurs from July to September. Leaves on Tanacetum species are typically alternate and often deeply lobed, and many plants in the genus carry a noticeable aroma.
About the genus
Tanacetum is a genus of about 160 species of flowering plants in the aster family, Asteraceae, native to many regions of the Northern Hemisphere. They are known commonly as tansies. The name tansy can refer specifically to Tanacetum vulgare, which may be called the common tansy or garden tansy for clarity.
Wikipedia contributors, "Tanacetum", CC BY-SA 4.0 — Tanacetum
In the garden
Tanacetum herderi belongs to the genus Tanacetum, a group of around 160 species in the aster family Asteraceae that occur across the Northern Hemisphere. The genus includes a range of growth habits — from small herbs to specimens approaching 1.5 metres — and contains familiar relatives such as costmary and feverfew; the generic name has historical associations with preservation. Species within Tanacetum commonly develop one or more branching stems, frequently arise from rhizomes, and bear alternately arranged, often deeply lobed leaves; many are aromatic. Flower heads in the genus are composite, with multiple yellow disc florets and phyllaries at the base, and inflorescences range from loose to dense and from flat to hemispheric in profile. For precise site, soil and hardiness information for Tanacetum herderi, refer to the plant label or supplier notes, since requirements can vary between species and cultivars. In a UK garden context, the genus’s late-summer flowering makes these plants useful for adding structure and colour to borders and meadow-style plantings between July and September. Plants with rhizomatous or perennial habits from this genus can also be managed by division where appropriate; check the specific plant information to confirm suitable maintenance for Tanacetum herderi.
