Calea zacatechichi (Bitter grass) 9 cm pot

Growth habit & appearance: Calea zacatechichi forms a slender, openly branched shrub with thin, angular stems and softly serrated leaves that release a characteristic bitter aroma when touched. The foliage presents a pale green, almost silvery cast when young, creating a visually delicate plant with a slightly ethereal texture. Small, inconspicuous flower heads may form under ideal warmth, but its graceful framework of light foliage is its main ornamental feature.

Growing conditions: This species is tender in Ireland and must be kept indoors or in a heated glasshouse year-round. It favours full sun, warm airflow, and sharply drained compost that dries out between waterings. Over-watering in cool Irish conditions leads quickly to root stress, so a dry, bright windowsill or sunroom is ideal. Native to the Americas, it grows as a perennial only when protected from cold.

Traditional & herbal uses: Historically associated with dreaming rituals and used as a traditional bitter herb, Calea zacatechichi has been employed as an aperitif and for enhancing dream recall in various cultural contexts. The leaves have a pronounced bitterness that has informed both their traditional roles and their sensory profile.

Maintenance & harvesting: Allow the compost to dry significantly before watering, especially during the darker months. Keep warm, ideally above 15°C, and pinch back new growth to maintain a compact shape. Repot or feed once active growth resumes in spring. Harvest leaves sparingly from well-established plants; use gloves when handling if skin is sensitive, as the bitter compounds can cause mild irritation in some individuals. Always protect the plant from cold draughts.