Tips View Cart Misting Guidelines Apply mist only during daylight hours to avoid excessive humidity at night, which encourages disease. Remember, when the greenhouse cools at night, the relative humidity will rise even with the misting system off. Use a 24-hour timer to shut off the misting system 2 hours before sundown. Cooling Shading and ventilation are required during summer to prevent a greenhouse from seriously overheating, but it is evaporative cooling from a misting system which can actually cool the greenhouse to a comfortable level. When a greenhouse warms up and venting begins, essential moisture is lost with the vented air.
Plants lose moisture more rapidly and begin to wilt.
Install nozzles under the benches to avoid soaking plants on the benches. Control this type of system with a humidistat . Overhead Watering Many foliage plants, tropicals and subtropicals can be watered and fertilized by an overhead misting system. Use 2 gph nozzles installed as high as possible. Control this system with a short-cycle timer .