Digital Combo Hygrometer with Probe
During the plants vegetative state your grow room temperature should be ideally : 23°c day & night - humidity: 70% and during flowering stage : 27 / 28°c (at night/lights turned off: 19 / 20°c) - humidity: 40% for final weeks. Hydro Hobby sell only first class reliable Digital Combo Hygrometer with Probe and Digital Combo Hygrometer - that will enable you to monitor and obtain the perfect environment for your plants.