Tanacetum vulgare (Tansy) 9 cm Pot

Growth habit & appearance: Tanacetum vulgare forms vigorous, upright clumps of strongly aromatic, fern-like foliage with sharply cut segments that give the plant a distinctive texture within the Asteraceae. In mid to late summer it produces dense, flat-topped clusters of bright yellow, button-shaped flowers that lack petals—an instantly recognisable feature of Tansy. These nectar-rich discs support a variety of pollinating insects and contribute colour and structure to wildlife-friendly plantings.

Growing conditions: A fully hardy perennial well suited to Irish conditions, Tansy thrives in full sun to partial shade and tolerates a wide range of soils, including poorer or stony ground. Once established it is extremely resilient and long-lived, spreading gradually by rhizomes. It integrates easily into herb gardens, cottage borders, and wild margins.

Traditional & herbal uses: Traditionally used for worms, to stimulate menses, and as a digestive aid, Tanacetum vulgare has a long European history as a medicinal and household herb. Its aromatic compounds were valued in both herbal and domestic contexts. Ecologically, the plant offers pollen resources for a variety of insects, and its strongly scented foliage can deter certain unwanted pests in mixed plantings.

Maintenance & harvesting: Maintenance is straightforward: keep the plant in a sunny or lightly shaded position, cut back after flowering, and divide clumps every few years to manage spread. Tansy can self-seed lightly, so removing spent heads will help control its distribution. Harvest aerial parts at full bloom for traditional uses, and save seed once the flower clusters dry.