Rules – why?

I have been told that the “rule of thumb” is not to plant flowers and summer vegetables until Mother’s Day, or at the earliest, May 1. First, what exactly does “rule of thumb” mean? Do thumbs have rules? Are there rules about thumbs and what they can or cannot do?

In general, I am a decent citizen and rule-follower; I wear seat belts, wear masks when mandated or when I travel, pick up after my dog, don’t litter, and stop for pedestrians. Some rules I have learned to follow the hard way. The speeding ticket I got for driving 85 mph in a 65-mph zone taught me how to use cruise control on my car....