I think it's humid for DFW standards: around 40-30% humidity during the day I think? I'm not sure what the plants think about it, but it feels very dry to me; however I'm originally from the Northeast (NYC) where the summer humidity is so bad it's like being smothered in a hot, wet blanket.
I took the plastic off the top of the sip covering the soil today, so I'm going to let it dry out a bit before adding water to the reservoir. As it was over 100 degrees today that shouldn't take long
. Fine gravel is on my shoping list.