Ecology

The plants are mostly perennial and are native to North America and parts of East Asia.

It is strongly tolerant of heat, wind, and drought, and performs best in full sun and sharply drained soils, where its aromatic foliage and deepening root system support resilience during prolonged dry periods.

 The narrow, serrated leaves and high essential-oil content reduce transpiration and deter grazing by deer and rabbits, while the woody crown at the base provides structural durability from year to year.