To dream of lettuce represents choices that you feel aren’t serious or won’t bother anyone else. Issues that you don’t feel are important enough to matter or cause conflict. Situations or choices that you assume will be agreeable to all. Not feeling that you need permission or need to ask someone what they think. An issue that you feel is “non-issue” due to it’s perceived simplicity.
Negatively, lettuce may be a sign that you are too confident that an issue won’t be sensitive to someone else. Blind assumptions about something difficult or dangerous being too easy.
Example: A woman dreamed of washing and seeing dead bugs in the water in the sink. In waking life she got an abortion was was realizing that it wasn’t as emotionally easy to go through with as she originally thought.