I have a lot of seed trays I water at least twice a day per hand. I grow herbs and the like and some seeds need several months to come up. It is getting hotter now here. As seed trays I use these white poly boxes you get at the greengrocer.

What is the best watering system for these trays? A misting system? Soaker hose? How often do I set the timer for how long? I want the nozzles to be close to the ground that the wind does not carry the water away.