What needs monitoring?  What needs to be done to make sure plants grow well? Research your plant's needs.  Many cool weather plants typically enjoy temperature​s in the day of ​70°-­75°F​, and night ​55°-­60°F​ with a relative-humidity​ of ​40%-­60%​ for most growing plants.  A water and nutrient solution system should have a temperature between ​18­-21°​C (​64­-70°​F).  These factors vary depending on variety, selection, phase of growth that the plants are currently growing, and hardiness, some plants can tolerate stress better than others.