Currently watering these containers 60 minutes daily with (2) 1/2 gal drippers. Some suggest that is more advantageous to water twice per day during hot weather with a drip system. My question is about water dispersion. Right now 60 minutes seems to wet enough of the pots so that tomatoes are doing fine. So I wonder if going to twice a day would even be better? If so, would 30 minutes twice per day keep the entire pot moist or should the time be increased?