I guess that applies to me. For years, I have planted radishes -- in various times, in various depths, in various locations. I follow the directions on the packet to the Nth degree. No matter where or when I plant, I only get spindly stems -- never a radish.
As I recall, kids in the fifth grade plant radish seed as their science project, and often are successful.
Am I doing something wrong, or am I just crazy?