@jayjaytocool I would like it to sense a defined moisture content in the soil then open a solenoid valve till water is sensed at the drain. I would also like it to only water from morning to noon. So if it's needs water at 4pm it waits till morning to water. Also I would like there to be an off delay. So water is alowed to continue flowing for x time after water is sensed at the drain. One greenhouse can have 500-100 plants. So u can see my concern with cost. Either way I think it will be fun to try. Great forum thanks for all the information and help