Concrete Wicking Moisture
My question is this: Does concrete wick or retain soil moisture? I have a great deal of exposed aggregate concrete on my property and in certain spots, I've left holes in it for pockets of green. Currently there are is Miscanthus in some holes and English Lavender in others. I often wonder if weekly waterings with the hose is under- or over-watering them. As a general rule, does concrete wick moisture? Or does it prevent evaporation?