This may not be fact… but this is what the “Old Timers” Say,

Cayenne, bell, jalapeno you name it they need it. Sulfur. Ever smell a pepper when you cut it. Has that really really light rotten egg smell. That’s the sulfur in the pepper. The hull of the pod uses the sulfur in its cellular walls.

Peppers thrive best if the individual who plants them is angry at the time, and if a lunatic can be induced to do the planting, so much the better.