A study was made of the epitaxial growth of ZnSe films in a semi-closed volume on various orienting substrates in a range of incident flow densities from 6 multiplied by (times) 10**1**5 to 1. 2 multiplied by (times) 10**1**8 cm** minus **2 sec** minus **1. It is shown that the boundary of the transition from the growth of textured films to the growth of single-crystal films may be described by a straight-line equation. The activation energies for the growth of epitaxial ZnSe films on substrates made of fluophlogopite mica, ZnSe, Ge, and GaAs substrates are calculated.