Hi Alfonso, 

EPA mode allows the moisture level to deplete to a lower level  than deep mode before next watering, and it has  longer watering duration than any other smart watering modes.  We recommend using EPA mode to avoid watering equally everyday and instead to water less frequently but deeply. 

Thanks, 

Netro Support

I have been exploring the different modes for different things. I'm thinking for establishing plants I will switch from new plant, to regular, then deep, then end up on EPA with eventually all of my trees and shrubs.

Potted plants with spot spitters just get frequent shallow watering. I have not tried starting veg garden seeds yet but will.