Overview
Romaine is an elongated heading type of lettuce. There are several types and varieties, which vary in color and how tightly they close. In the industry, Romaine is often referred to as “self closing” or “loose closing” with loose closing referring to those types in which the leaves do not curl inward at the top to form a head.
U.S. Grades
The USDA provides for a U.S. No. 1 Grade Standard. There is no Canadian Grade Standard for Romaine
Storage Conditions
Temperatures from 32° F (0° C) with 95 percent relative humidity will optimize the shelf life of this product. Romaine can tolerate slightly higher temperatures during transit and handling, assuming no other complications (such as ethylene gas) are involved
