How tall do poinsettias grow in the wild?

A mature height of 2 feet-15 feet/0.6096-4.9 meters is possible for poinsettias (Euphorbia pulcherrima), depending upon the context.

Specifically, in their native Mexican habitat, poinsettias have a chance of realizing their full potential as perennial shrubs. But in the United States of America, they traditionally are viewed as end-of-year holiday plants to be kept in houseplant containers and treated as annuals whose life is short and whose demise is imminent. In this role, they tend to be cultivated to reach mature heights about one-eighth (1/8) of their potential in the wild.