Thermometers and hygrometers are a basic tool that almost every grower has in their box of tricks. Keeping track of temperature is one of the most basic methods to ensuring your plants are living in an ideal environment, and a thermometer or hygrometer can tell you when it is too …hot, too cold, too moist, or too dry, letting you fix issues before mold, heat stress, or other problems can take over. HTG Supply has thermometers for your garden, shop now to get the gear for your next grow.