Elm is a remedy for people suffering a temporary loss of confidence due to the overwhelming amount of responsibility they have taken on. Genuine Elm types are people who are successful and carry out work they believe in, but at times the burden brings them down and they feel they will not be able to cope. The remedy helps to dispel these feelings so that we can resume our lives without thought of failure.
The Elm state can be usefully contrasted with that of "Larch". People in the former take up challenges willingly and only occasionally doubt their abilities; it's the scale of a task, rather than the difficulty of doing something well, that causes the crisis. Larch people are convinced they are going to fail right from the start, and so tend not to try in the first place.
Suggested for those that feel overwhelmed and depressed.