One of my raised beds requires very little water. I don't know why it is different from the others; all have the same soil mixture and receive roughly the same amount of sun. Last year, I had peppers in this bed, and I killed two Habaneros with over-watering. This year I have first-year strawberries in there, and despite this dry heat we are having, I haven't watered it for a week. I keep poking my finger into the soil, and it's still moist. Maybe your jalapeno bed just requires more water.
"Imagination is more important than knowledge." -- Albert Einstein