I'm new to tomato growing. I've read that you don't want to water too much. I currently have a few I've started from seed in 6" pots waiting for transplant into the fall green house. When looking at the pot, the top inch or so is very dry. But below that, the moisture levels are very sufficient (both observation and the meter indicate this). Is it time to water? Should I only water enough to moisten the top inch of mix? I'm in Oklahoma and using a basic potting mix.

Thank you!

John