Close the Ends of the Hoop House
Prior to closing up the hoop house, give plants a thorough watering. At each end of the hoop house, fold the ends of the plastic row cover so that they close like an envelope. Weigh the ends down with a heavy object, such as a brick, sandbag or rock.
If the hoop house isn't tall enough for a person to comfortably move around inside and effectively water the plants, insert drip irrigation hoses across the length of the garden bed. Hook up the ends of the hoses to a water source and water plants as necessary.