Creosote Bush

Creosote bush (*Larrea tridentata*) is a rounded, multi-stemmed evergreen shrub of the dry Southwest. Its small resinous leaves conserve moisture, and yellow flowers appear most heavily in spring, with occasional blooms at other times of year. The foliage releases a distinctive earthy scent after rain. ## Form and landscape use [University of Arizona Extension’s Yavapai County profile](https://yavapaiplants.extension.arizona.edu/larrea-tridentata) describes creosote in desert scrub, plains, mesas, and slopes, where its open branching and drought adaptation suit naturalistic and water-conscious landscapes. The profile gives a height of up to about 13 feet and width of 10 feet; actual form varies with site and rainfall. Use it where there is room for a large shrub rather than pruning it into a tight formal shape. ## Establishment Plant in well-drained native soil and water periodically during establishment. [University of Arizona Extension’s guide](https://extension.arizona.edu/sites/extension.arizona.edu/files/attachment/CreosoteBush.pdf) says irrigation can be reduced and eventually stopped once plants are established. The oil-coated leaves fold during severe drought and may drop during prolonged dry periods. ## Maintenance Avoid excessive pruning; remove damaged branches and let the shrub keep its natural outline. The wet foliage scent can trigger allergic reactions in some people, and livestock may be poisoned if they eat large quantities, so keep grazing animals from consuming it. Do not use it as a home remedy; its pharmacology is not well understood.