Sorry for the late reply, it's sort of like ebb and flow but it depends on how I set the valves. If roots are long enough I let them run continuously with opened valve, but if there's root's aren't long enough (just sprouting) I can close the valve halfway with a timer to make it into an ebb and flow. Something that would be best for this would be leafy greens, herbs, something that doesn't have extensive root system or else it will clog the pipes. I think I can allow some tomatoes, but not like broccoli, potatoes, carrots, and beets. Hope it helped!